www.cms.gov: History & Trends
How this site has changed over time. The weekly overview answers "what should I fix now?"; this page answers "how are we trending?"
Tracking since 2026-W24 — 17 weeks recorded. Accessibility score is stable (+0 pts since 2026-W36). Download the full trend series: CSV · JSON.
How the latest week compares
Latest week (2026-W40) vs. earlier look-back windows. positive/negative is relative to each measure — coloured by better or worse
| Measure | Now | vs 4 wk ago | vs 13 wk ago |
|---|
| Accessibility score | 100 | no change | no change |
|---|
| Median axe violations / page | 0 | no change | no change |
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| Median page weight (KB) | 1834 KB | +644 KB worse | +12 KB worse |
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| Reading ease (Flesch) | 41 | no change | -0.10000000000000142 worse |
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| Standards checks passing (%) | 45% | -1% worse | +3% better |
|---|
Accessible? — severity over time
Pages affected by axe severity over 17 weeks (lower is better)
Pages affected by axe severity, by week
| Week | Critical | Serious | Moderate | Minor |
|---|
| 2026-W24 | 11 | 64 | 278 | 20 |
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| 2026-W25 | 276 | 1557 | 994 | 309 |
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| 2026-W26 | 153 | 916 | 810 | 60 |
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| 2026-W27 | 91 | 1674 | 804 | 30 |
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| 2026-W28 | 85 | 1884 | 961 | 25 |
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| 2026-W29 | 80 | 1507 | 1062 | 60 |
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| 2026-W30 | 59 | 1264 | 544 | 52 |
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| 2026-W31 | 48 | 880 | 362 | 38 |
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| 2026-W32 | 73 | 998 | 478 | 71 |
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| 2026-W33 | 129 | 1263 | 612 | 125 |
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| 2026-W34 | 146 | 1123 | 649 | 140 |
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| 2026-W35 | 268 | 1470 | 1001 | 279 |
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| 2026-W36 | 175 | 795 | 615 | 179 |
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| 2026-W37 | 253 | 1048 | 855 | 264 |
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| 2026-W38 | 307 | 1129 | 952 | 318 |
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| 2026-W39 | 259 | 982 | 835 | 275 |
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| 2026-W40 | 106 | 390 | 353 | 113 |
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Fast? — Lighthouse over time
Lighthouse category scores over 17 weeks
Lighthouse category scores by week
| Week | Performance | Accessibility | Best practices | SEO |
|---|
| 2026-W24 | 66 | 100 | 100 | 92 |
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| 2026-W25 | 64 | 100 | 96 | 100 |
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| 2026-W26 | 64 | 100 | 96 | 100 |
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| 2026-W27 | 61 | 100 | 96 | 100 |
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| 2026-W28 | 57 | 100 | 96 | 100 |
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| 2026-W29 | 62 | 100 | 100 | 92 |
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| 2026-W30 | 61 | 100 | 100 | 69 |
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| 2026-W31 | 63 | 100 | 100 | 92 |
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| 2026-W32 | 57 | 100 | 96 | 100 |
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| 2026-W33 | 56 | 100 | 96 | 100 |
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| 2026-W34 | 55 | 100 | 96 | 100 |
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| 2026-W35 | 58 | 100 | 96 | 100 |
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| 2026-W36 | 59 | 100 | 92 | 100 |
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| 2026-W37 | 57 | 100 | 96 | 100 |
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| 2026-W38 | 57 | 100 | 96 | 100 |
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| 2026-W39 | 55 | 100 | 96 | 100 |
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| 2026-W40 | 57 | 100 | 88 | 92 |
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Lighthouse trend points are based on sampled pages and can vary week-to-week depending on which pages were sampled.
Sustainable? — page weight, requests & carbon over time
Median page weight (KB) over 17 weeks — better (1887 KB → 1834 KB)
Median page weight (KB) by week
| Week | Median page weight (KB) |
|---|
| 2026-W24 | 1887 KB |
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| 2026-W25 | 1851 KB |
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| 2026-W26 | 1824 KB |
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| 2026-W27 | 1822 KB |
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| 2026-W28 | 1855 KB |
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| 2026-W29 | 1812 KB |
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| 2026-W30 | 1810 KB |
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| 2026-W31 | 1811 KB |
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| 2026-W32 | 0 KB |
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| 2026-W33 | 1186 KB |
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| 2026-W34 | 1209 KB |
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| 2026-W35 | 1191 KB |
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| 2026-W36 | 1190 KB |
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| 2026-W37 | 1190 KB |
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| 2026-W38 | 1219 KB |
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| 2026-W39 | 1228 KB |
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| 2026-W40 | 1834 KB |
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Median requests per page over 17 weeks — better (51 → 44)
Median requests per page by week
| Week | Median requests per page |
|---|
| 2026-W24 | 51 |
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| 2026-W25 | 44 |
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| 2026-W26 | 44 |
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| 2026-W27 | 44 |
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| 2026-W28 | 44 |
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| 2026-W29 | 45 |
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| 2026-W30 | 46 |
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| 2026-W31 | 44 |
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| 2026-W32 | 2 |
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| 2026-W33 | 41 |
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| 2026-W34 | 42 |
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| 2026-W35 | 41 |
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| 2026-W36 | 40 |
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| 2026-W37 | 40 |
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| 2026-W38 | 41 |
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| 2026-W39 | 40 |
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| 2026-W40 | 44 |
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Mean CO₂ per page (g) over 17 weeks — better (0.2737 g → 0.2082 g)
Mean CO₂ per page (g) by week
| Week | Mean CO₂ per page (g) |
|---|
| 2026-W24 | 0.2737 g |
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| 2026-W25 | 0.2913 g |
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| 2026-W26 | 0.2898 g |
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| 2026-W27 | 0.3055 g |
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| 2026-W28 | 0.3258 g |
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| 2026-W29 | 0.3021 g |
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| 2026-W30 | 0.2852 g |
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| 2026-W31 | 0.2497 g |
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| 2026-W32 | 0.1622 g |
|---|
| 2026-W33 | 0.1859 g |
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| 2026-W34 | 0.1793 g |
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| 2026-W35 | 0.1855 g |
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| 2026-W36 | 0.1859 g |
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| 2026-W37 | 0.1839 g |
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| 2026-W38 | 0.1969 g |
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| 2026-W39 | 0.1966 g |
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| 2026-W40 | 0.2082 g |
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Findable? — readability over time
Reading ease (Flesch) over 17 weeks — better (39.2 → 41)
Reading ease (Flesch) by week
| Week | Reading ease (Flesch) |
|---|
| 2026-W24 | 39.2 |
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| 2026-W25 | 41 |
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| 2026-W26 | 40.5 |
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| 2026-W27 | 41.1 |
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| 2026-W28 | 41 |
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| 2026-W29 | 41 |
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| 2026-W30 | 41 |
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| 2026-W31 | 41 |
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| 2026-W32 | 40 |
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| 2026-W33 | 41 |
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| 2026-W34 | 40.9 |
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| 2026-W35 | 40.7 |
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| 2026-W36 | 41 |
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| 2026-W37 | 41 |
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| 2026-W38 | 41 |
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| 2026-W39 | 42 |
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| 2026-W40 | 41 |
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Reading grade (Flesch-Kincaid) over 17 weeks — better (14.8 → 14)
Reading grade (Flesch-Kincaid) by week
| Week | Reading grade (Flesch-Kincaid) |
|---|
| 2026-W24 | 14.8 |
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| 2026-W25 | 14 |
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| 2026-W26 | 14.1 |
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| 2026-W27 | 13.9 |
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| 2026-W28 | 14 |
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| 2026-W29 | 14 |
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| 2026-W30 | 14 |
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| 2026-W31 | 14 |
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| 2026-W32 | 14 |
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| 2026-W33 | 13.8 |
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| 2026-W34 | 13.9 |
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| 2026-W35 | 13.9 |
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| 2026-W36 | 14 |
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| 2026-W37 | 14 |
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| 2026-W38 | 14 |
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| 2026-W39 | 14 |
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| 2026-W40 | 14 |
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Words per page (median) over 17 weeks — 387 → 976
Words per page (median) by week
| Week | Words per page (median) |
|---|
| 2026-W24 | 387 |
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| 2026-W25 | 747 |
|---|
| 2026-W26 | 688 |
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| 2026-W27 | 898 |
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| 2026-W28 | 983 |
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| 2026-W29 | 575 |
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| 2026-W30 | 509 |
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| 2026-W31 | 522 |
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| 2026-W32 | 1491 |
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| 2026-W33 | 2579 |
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| 2026-W34 | 1985 |
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| 2026-W35 | 1939 |
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| 2026-W36 | 1258 |
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| 2026-W37 | 1293 |
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| 2026-W38 | 1143 |
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| 2026-W39 | 1515 |
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| 2026-W40 | 976 |
|---|
Trustworthy? — technology & standards over time
Technologies detected over 16 weeks — unchanged
Technologies detected by week
| Week | Technologies detected |
|---|
| 2026-W25 | 15 |
|---|
| 2026-W26 | 16 |
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| 2026-W27 | 15 |
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| 2026-W28 | 16 |
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| 2026-W29 | 15 |
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| 2026-W30 | 15 |
|---|
| 2026-W31 | 17 |
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| 2026-W32 | 16 |
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| 2026-W33 | 17 |
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| 2026-W34 | 16 |
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| 2026-W35 | 17 |
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| 2026-W36 | 16 |
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| 2026-W37 | 16 |
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| 2026-W38 | 16 |
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| 2026-W39 | 16 |
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| 2026-W40 | 15 |
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Standards checks passing (%) over 16 weeks — worse (46% → 45%)
Standards checks passing (%) by week
| Week | Standards checks passing (%) |
|---|
| 2026-W25 | 46% |
|---|
| 2026-W26 | 43% |
|---|
| 2026-W27 | 42% |
|---|
| 2026-W28 | 42% |
|---|
| 2026-W29 | 44% |
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| 2026-W30 | 47% |
|---|
| 2026-W31 | 47% |
|---|
| 2026-W32 | 47% |
|---|
| 2026-W33 | 46% |
|---|
| 2026-W34 | 46% |
|---|
| 2026-W35 | 46% |
|---|
| 2026-W36 | 46% |
|---|
| 2026-W37 | 46% |
|---|
| 2026-W38 | 45% |
|---|
| 2026-W39 | 45% |
|---|
| 2026-W40 | 45% |
|---|
Security checks passing (%) over 16 weeks — unchanged
Security checks passing (%) by week
| Week | Security checks passing (%) |
|---|
| 2026-W25 | 75% |
|---|
| 2026-W26 | 75% |
|---|
| 2026-W27 | 75% |
|---|
| 2026-W28 | 75% |
|---|
| 2026-W29 | 75% |
|---|
| 2026-W30 | 75% |
|---|
| 2026-W31 | 75% |
|---|
| 2026-W32 | 75% |
|---|
| 2026-W33 | 75% |
|---|
| 2026-W34 | 75% |
|---|
| 2026-W35 | 75% |
|---|
| 2026-W36 | 75% |
|---|
| 2026-W37 | 75% |
|---|
| 2026-W38 | 75% |
|---|
| 2026-W39 | 75% |
|---|
| 2026-W40 | 75% |
|---|