UK FLIGHT DELAY INDEX

derived from CAA punctuality statistics for UK reporting airports

How often are these flights late or cancelled?

Cathay Pacific Airways

In the twelve months from July 2025 to June 2026, 34.0% of 2,193 movements arriving into the UK were disrupted — more than fifteen minutes late or cancelled at short notice.

Put the other way round, 66.0% of 2,193 movements met the fifteen-minute convention. These are historical observations, not a forecast.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Source: CAA punctuality statistics · snapshot 17/08/2026 10:24 · method route-record-v2.1 · Versioned claims, formulas and entity mapping.

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

The four numbers at a glance

34.0% of 2,193 movements were disrupted over July 2025 to June 2026.

Average delay covers delayed movements only. Its range reflects rounded source means and the unknown count of exactly punctual movements.

DisruptionShort-notice cancellationsDelay among delayed movementsOver three hours
34.0% of 2,193 movements0.7% of 2,193 movements33.4–60.5 minutes; delayed denominator 730–1,2581.0% of 2,193 movements
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

When late, how late?

1.0% of 2,193 movements passed the three-hour mark.

The ladder shows how many movements crossed each threshold. Cancellations are separate: 0.7% of 2,193 movements.

DelayShare and sampleOne event per movements
More than 15 minutes33.3% of 2,193 movements3.0
More than 30 minutes17.7% of 2,193 movements5.6
More than 60 minutes6.5% of 2,193 movements15.4
More than 120 minutes2.1% of 2,193 movements46.7
More than 180 minutes1.0% of 2,193 movements104.4
More than 360 minutes0.5% of 2,193 movements182.8
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Slightly late or occasionally a disaster?

2.1% of 2,193 movements passed two hours.

The histogram shows the published delay bands. Bucket shares use all reported operations, including unmatched records; cancellations are reported separately.

Nine delay buckets, minutes; share of all recorded operations>15 early43319.7%15–1 early48722.2%0–15 late52824.1%16–3034115.5%31–6024711.3%61…120954.3%121…180261.2%181…36090.4%>360120.5%D=2,193
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Better or worse since the start of the archive?

Best month: Sep 2021, 7.5% of 107 movements. Worst month: Jul 2022, 67.3% of 55 movements.

The line traces every month. Lower disruption is better; gaps are never zeros. Pandemic readings describe a different operating regime.

Monthly disruption share; gaps mean no published dataJan 2018: 31.1%; sample: 2092018Feb 2018: 14.1%; sample: 192Mar 2018: 37.1%; sample: 213Apr 2018: 51.8%; sample: 197May 2018: 16.7%; sample: 192Jun 2018: 24.1%; sample: 203Jul 2018: 9.2%; sample: 217Aug 2018: 19.8%; sample: 217Sep 2018: 35.7%; sample: 210Oct 2018: 26.1%; sample: 203Nov 2018: 25.8%; sample: 194Dec 2018: 27.9%; sample: 208Jan 2019: 13.9%; sample: 2022019Feb 2019: 23.7%; sample: 190Mar 2019: 35.6%; sample: 202Apr 2019: 46.7%; sample: 210May 2019: 28.6%; sample: 192Jun 2019: 29.4%; sample: 201Jul 2019: 13.0%; sample: 216Aug 2019: 32.4%; sample: 216Sep 2019: 20.5%; sample: 210Oct 2019: 44.7%; sample: 199Nov 2019: 23.6%; sample: 195Dec 2019: 19.8%; sample: 207Jan 2020: 27.4%; sample: 2082020Feb 2020: 30.1%; sample: 163Mar 2020: 13.3%; sample: 75Apr 2020: suppressed: fewer than twenty movements×May 2020: suppressed: fewer than twenty movements×Jun 2020: suppressed: fewer than twenty movements×Jul 2020: suppressed: fewer than twenty movements×Aug 2020: 0.0%; sample: 22Sep 2020: 4.3%; sample: 47Oct 2020: 3.2%; sample: 31Nov 2020: 0.0%; sample: 30Dec 2020: 9.7%; sample: 31Jan 2021: suppressed: fewer than twenty movements×2021Feb 2021: suppressed: fewer than twenty movements×Mar 2021: suppressed: fewer than twenty movements×Apr 2021: suppressed: fewer than twenty movements×May 2021: suppressed: fewer than twenty movements×Jun 2021: suppressed: fewer than twenty movements×Jul 2021: 9.1%; sample: 33Aug 2021: 4.2%; sample: 48Sep 2021: 7.5%; sample: 107Oct 2021: 21.9%; sample: 64Nov 2021: 15.4%; sample: 39Dec 2021: 17.5%; sample: 57Jan 2022: suppressed: fewer than twenty movements×2022Feb 2022: suppressed: fewer than twenty movements×Mar 2022: suppressed: fewer than twenty movements×Apr 2022: suppressed: fewer than twenty movements×May 2022: 60.7%; sample: 28Jun 2022: 53.2%; sample: 47Jul 2022: 67.3%; sample: 55Aug 2022: 28.3%; sample: 60Sep 2022: 57.7%; sample: 78Oct 2022: 62.9%; sample: 62Nov 2022: 23.8%; sample: 101Dec 2022: 18.1%; sample: 94Jan 2023: 15.3%; sample: 1112023Feb 2023: 44.2%; sample: 113Mar 2023: 31.3%; sample: 147Apr 2023: 34.5%; sample: 142May 2023: 16.7%; sample: 144Jun 2023: 31.5%; sample: 149Jul 2023: 34.0%; sample: 162Aug 2023: 26.9%; sample: 156Sep 2023: 43.5%; sample: 170Oct 2023: 27.2%; sample: 169Nov 2023: 37.2%; sample: 145Dec 2023: 53.1%; sample: 145Jan 2024: 35.8%; sample: 1342024Feb 2024: 33.1%; sample: 136Mar 2024: 18.2%; sample: 148Apr 2024: 37.3%; sample: 142May 2024: 28.2%; sample: 149Jun 2024: 27.1%; sample: 170Jul 2024: 31.6%; sample: 155Aug 2024: 36.2%; sample: 160Sep 2024: 25.3%; sample: 174Oct 2024: 28.5%; sample: 172Nov 2024: 11.2%; sample: 161Dec 2024: 13.3%; sample: 166Jan 2025: 9.5%; sample: 1792025Feb 2025: 10.4%; sample: 164Mar 2025: 9.3%; sample: 182Apr 2025: 47.2%; sample: 180May 2025: 34.9%; sample: 169Jun 2025: 27.0%; sample: 163Jul 2025: 24.2%; sample: 186Aug 2025: 34.8%; sample: 187Sep 2025: 54.2%; sample: 179Oct 2025: 47.3%; sample: 186Nov 2025: 8.9%; sample: 180Dec 2025: 21.0%; sample: 186Jan 2026: 32.8%; sample: 1862026Feb 2026: 31.5%; sample: 168Mar 2026: 15.8%; sample: 190Apr 2026: 65.2%; sample: 184May 2026: 35.7%; sample: 182Jun 2026: 36.9%; sample: 179Pandemic regime Jun 2020Summer 2022 breakdown Jul 2022NATS system failure Aug 2023Heathrow fire closure Mar 2025100%0%
Every monthly observation
MonthDisruption on arrivals
Jan 201831.1% of 209 movements
Feb 201814.1% of 192 movements
Mar 201837.1% of 213 movements
Apr 201851.8% of 197 movements
May 201816.7% of 192 movements
Jun 201824.1% of 203 movements
Jul 20189.2% of 217 movements
Aug 201819.8% of 217 movements
Sep 201835.7% of 210 movements
Oct 201826.1% of 203 movements
Nov 201825.8% of 194 movements
Dec 201827.9% of 208 movements
Jan 201913.9% of 202 movements
Feb 201923.7% of 190 movements
Mar 201935.6% of 202 movements
Apr 201946.7% of 210 movements
May 201928.6% of 192 movements
Jun 201929.4% of 201 movements
Jul 201913.0% of 216 movements
Aug 201932.4% of 216 movements
Sep 201920.5% of 210 movements
Oct 201944.7% of 199 movements
Nov 201923.6% of 195 movements
Dec 201919.8% of 207 movements
Jan 202027.4% of 208 movements
Feb 202030.1% of 163 movements
Mar 202013.3% of 75 movements
Apr 2020suppressed: fewer than twenty movements
May 2020suppressed: fewer than twenty movements
Jun 2020suppressed: fewer than twenty movements
Jul 2020suppressed: fewer than twenty movements
Aug 2020no events in 22 movements — small sample, not ranked
Sep 20204.3% of 47 movements — small sample, not ranked
Oct 20203.2% of 31 movements — small sample, not ranked
Nov 2020no events in 30 movements — small sample, not ranked
Dec 20209.7% of 31 movements — small sample, not ranked
Jan 2021suppressed: fewer than twenty movements
Feb 2021suppressed: fewer than twenty movements
Mar 2021suppressed: fewer than twenty movements
Apr 2021suppressed: fewer than twenty movements
May 2021suppressed: fewer than twenty movements
Jun 2021suppressed: fewer than twenty movements
Jul 20219.1% of 33 movements — small sample, not ranked
Aug 20214.2% of 48 movements — small sample, not ranked
Sep 20217.5% of 107 movements
Oct 202121.9% of 64 movements
Nov 202115.4% of 39 movements — small sample, not ranked
Dec 202117.5% of 57 movements
Jan 2022suppressed: fewer than twenty movements
Feb 2022suppressed: fewer than twenty movements
Mar 2022suppressed: fewer than twenty movements
Apr 2022suppressed: fewer than twenty movements
May 202260.7% of 28 movements — small sample, not ranked
Jun 202253.2% of 47 movements — small sample, not ranked
Jul 202267.3% of 55 movements
Aug 202228.3% of 60 movements
Sep 202257.7% of 78 movements
Oct 202262.9% of 62 movements
Nov 202223.8% of 101 movements
Dec 202218.1% of 94 movements
Jan 202315.3% of 111 movements
Feb 202344.2% of 113 movements
Mar 202331.3% of 147 movements
Apr 202334.5% of 142 movements
May 202316.7% of 144 movements
Jun 202331.5% of 149 movements
Jul 202334.0% of 162 movements
Aug 202326.9% of 156 movements
Sep 202343.5% of 170 movements
Oct 202327.2% of 169 movements
Nov 202337.2% of 145 movements
Dec 202353.1% of 145 movements
Jan 202435.8% of 134 movements
Feb 202433.1% of 136 movements
Mar 202418.2% of 148 movements
Apr 202437.3% of 142 movements
May 202428.2% of 149 movements
Jun 202427.1% of 170 movements
Jul 202431.6% of 155 movements
Aug 202436.2% of 160 movements
Sep 202425.3% of 174 movements
Oct 202428.5% of 172 movements
Nov 202411.2% of 161 movements
Dec 202413.3% of 166 movements
Jan 20259.5% of 179 movements
Feb 202510.4% of 164 movements
Mar 20259.3% of 182 movements
Apr 202547.2% of 180 movements
May 202534.9% of 169 movements
Jun 202527.0% of 163 movements
Jul 202524.2% of 186 movements
Aug 202534.8% of 187 movements
Sep 202554.2% of 179 movements
Oct 202547.3% of 186 movements
Nov 20258.9% of 180 movements
Dec 202521.0% of 186 movements
Jan 202632.8% of 186 movements
Feb 202631.5% of 168 movements
Mar 202615.8% of 190 movements
Apr 202665.2% of 184 movements
May 202635.7% of 182 movements
Jun 202636.9% of 179 movements
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

What did the big disruptions do here?

Each event is compared with the twelve preceding calendar months and the first later return to baseline.

A worse month is not proof the named event caused it. The open data carry no delay-cause field. Recovery is observed for at most eight subsequent months.

EventDirectionDisruption that monthBaseline beforeReturn to baseline
Pandemic regime · Jun 2020Arrivalssuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Pandemic regime · Jun 2020Departuressuppressed: fewer than twenty movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Arrivals67.3% of 55 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
Summer 2022 breakdown · Jul 2022Departures73.7% of 57 movementsno complete baselinenot enough data: needs a complete baseline and a publishable event month
NATS system failure · Aug 2023Arrivals26.9% of 156 movements33.2% across 1,363 flightsreturned after 2 months
NATS system failure · Aug 2023Departures43.5% of 154 movements47.7% across 1,351 flightsreturned the next month
Heathrow fire closure · Mar 2025Arrivals9.3% of 182 movements23.1% across 1,940 flightsreturned after 8 months
Heathrow fire closure · Mar 2025Departures15.4% of 182 movements34.2% across 1,939 flightsreturned the next month
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which time of year has been hardest?

Highest median: Apr, 46.9% across 6 months. Lowest median: Dec, 20.4% across 6 months.

Even the same calendar month differs across years. This is a record, not a forecast; pandemic years are excluded from the summaries.

Each cell is one calendar month of one year; the number is the share of that month’s arrivals that were disrupted. Darker means worse. A blank cell means no published data, not zero.

Seasonality: calendar month by year; share and nJanFebMarAprMayJunJulAugSepOctNovDec201913.9% of 202 movements23.7% of 190 movements35.6% of 202 movements46.7% of 210 movements28.6% of 192 movements29.4% of 201 movements13.0% of 216 movements32.4% of 216 movements20.5% of 210 movements44.7% of 199 movements23.6% of 195 movements19.8% of 207 movements202027.4% of 208 movements30.1% of 163 movements13.3% of 75 movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementsno events in 22 movements †4.3% of 47 movements †3.2% of 31 movements †no events in 30 movements †9.7% of 31 movements †2021suppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements9.1% of 33 movements †4.2% of 48 movements †7.5% of 107 movements21.9% of 64 movements15.4% of 39 movements †17.5% of 57 movements2022suppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movementssuppressed: fewer than twenty movements60.7% of 28 movements †53.2% of 47 movements †67.3% of 55 movements28.3% of 60 movements57.7% of 78 movements62.9% of 62 movements23.8% of 101 movements18.1% of 94 movements202315.3% of 111 movements44.2% of 113 movements31.3% of 147 movements34.5% of 142 movements16.7% of 144 movements31.5% of 149 movements34.0% of 162 movements26.9% of 156 movements43.5% of 170 movements27.2% of 169 movements37.2% of 145 movements53.1% of 145 movements202435.8% of 134 movements33.1% of 136 movements18.2% of 148 movements37.3% of 142 movements28.2% of 149 movements27.1% of 170 movements31.6% of 155 movements36.2% of 160 movements25.3% of 174 movements28.5% of 172 movements11.2% of 161 movements13.3% of 166 movements20259.5% of 179 movements10.4% of 164 movements9.3% of 182 movements47.2% of 180 movements34.9% of 169 movements27.0% of 163 movements24.2% of 186 movements34.8% of 187 movements54.2% of 179 movements47.3% of 186 movements8.9% of 180 movements21.0% of 186 movements202632.8% of 186 movements31.5% of 168 movements15.8% of 190 movements65.2% of 184 movements35.7% of 182 movements36.9% of 179 movementsno datano datano datano datano datano data
Month-by-month table: median, observed range and sample
MonthMedianObserved rangeSample
Jan23.2%9.5–35.8%6 months, 1,021 flights
Feb27.6%10.4–44.2%6 months, 963 flights
Mar24.8%9.3–37.1%6 months, 1,082 flights
Apr46.9%34.5–65.2%6 months, 1,055 flights
May28.6%16.7–60.7%7 months, 1,056 flights
Jun29.4%24.1–53.2%7 months, 1,112 flights
Jul27.9%9.2–67.3%6 months, 991 flights
Aug30.4%19.8–36.2%6 months, 996 flights
Sep39.6%20.5–57.7%6 months, 1,021 flights
Oct36.6%26.1–62.9%6 months, 991 flights
Nov23.7%8.9–37.2%6 months, 976 flights
Dec20.4%13.3–53.1%6 months, 1,006 flights
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which routes have the best and worst record?

Lowest disruption: LHR ↔ HONG-KONG-CHEK-LAP-KOK, 34.0% of 1,828 movements. Highest disruption: MAN ↔ HONG-KONG-CHEK-LAP-KOK, 34.0% of 365 movements.

The airline table uses this carrier on each route; airport and country tables combine carriers. Each figure is arrivals into its UK airport. Only sufficiently large exact samples enter the ordered comparison.

Observed disruption share by optionLhr ↔ Hong-Kong-Chek-Lap-Kok34.0% of 1,828 flightsMan ↔ Hong-Kong-Chek-Lap-Kok34.0% of 365 flights
All route comparisons and sample flags
RouteDisruptionCancellationsSample flag
Heathrow ↔ Hong Kong (Chek Lap Kok)34.0% of 1,828 movements0.7% of 1,828 movementsdescriptive comparison
MAN ↔ HONG-KONG-CHEK-LAP-KOK34.0% of 365 movements0.8% of 365 movementsdescriptive comparison
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Which UK airports appear in this record?

2 published groups have enough arrivals to describe.

These operations are not matched for season, aircraft or time of day. The table makes no causal comparison.

UK airportDisruptionSample flag
Heathrow34.0% of 1,828 movementsdescriptive comparison
Manchester34.0% of 365 movementsdescriptive comparison
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Arrivals vs departures

34.0% of 2,193 movements arrivals were disrupted, against 28.6% of 2,200 movements departures.

The directions have separate denominators. A departure delay does not establish late arrival at the final destination; legal conditions differ by direction and carrier.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Movements past the three-hour mark

1.0% of 2,193 movements were more than three hours late over July 2025 to June 2026.

Cancellation is counted separately and is not a three-hour delay. Monthly counts cannot establish a passenger claim.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Facts about this record

Cathay Pacific Airways appears from Jan 2018 to Jun 2026 with 13,402 arrivals.

The bounds describe the published record, not every commercial service. Final point is not necessarily a nonstop destination.

Archive route pairs: 6.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

What this data cannot tell you

Delay cause, individual passenger experience, commercial decisions and future performance are not established here.

Also absent are aircraft type, within-month time-of-day splits and cancellations made ahead of the short-notice reporting window.

0 operations (0.00%) excluded because their published percentages could not be reconciled to whole numbers. Excluded operations enter neither the numerator nor the denominator. Outcome figures and comparisons are unavailable when the excluded share exceeds fifteen percent.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Quick answers

These answers use the same populations and window as the tables above.

Every percentage retains its denominator.

How disrupted are these arrivals?

34.0% of 2,193 movements over July 2025 to June 2026.

How often are they cancelled?

0.7% of 2,193 movements at short notice.

How late is late?

33.4–60.5 minutes; delayed denominator 730–1,258

Are services improving?

The monthly line records past changes; it is not a forecast or a causal comparison.

Which routes are compared?

The route table uses separately identified UK airport and final-point pairs, with small samples flagged.

Does this cover my flight?

Only published aggregate movements; the circumstances of any individual flight are unknown.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

How this was calculated

Source: CAA punctuality statistics · snapshot 17/08/2026 10:24 · method route-record-v2.1 · Versioned claims, formulas and entity mapping.

Integer bucket counts are recovered from rounding intervals over D=M+C+U with their sum constrained to M. Ambiguous counts remain ranges; failed reconciliation is quarantined.

Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.

Your trip has already gone wrong

The monthly line and events table show whether your month was typical or unusual in the published record.

Nothing here decides an individual case or what a passenger may be owed.

CAA: the official route to complain
Definitions, denominators and limits

Arrivals into UK reporting airports only unless labelled departures. Denominator: operated movements plus short-notice cancellations (M+C). A movement is not a scheduled flight. Unmatched records are data quality, not outcomes. Cells below twenty movements are suppressed; twenty to forty-nine are descriptive and not ranked.