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Sleep Latency By Annual Data Collection Points
| Year | No < 3 nights per week n(%) | Yes ≥ 3 nights per week n(%) | Sample (N) |
|---|---|---|---|
| 1 | 1647 (87.1) | 230 (12.2) | 1890 |
| 2 | 1553 (84.9) | 248 (13.6) | 1829 |
| 3 | 1471 (84.6) | 210 (12.1) | 1739 |
| 4 | 1307 (81.5) | 211 (13.2) | 1604 |
| 5 | 1154 (81.0) | 152 (10.7) | 1424 |
| 6 | 894 (77.7) | 135 (11.7) | 1151 |
| 7 | 763 (77.6) | 139 (14.1) | 983 |
| 8 | 625 (77.5) | 121 (15.0) | 806 |
| 9 | 493 (76.4) | 89 (13.8) | 645 |
| 10 | 391 (76.2) | 79 (15.4) | 513 |
