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| Groups | |||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | BT | |
| Late-born (Q4) | 593(19.14%) | 666 (18.27%) | 2103 (19.82%) | 247 (23.00%) | 268 (18.34%) |
| Q1-Q3 | 2505 (80.86%) | 2979 (81.73%) | 8509 (80.18%) | 827 (77.00%) | 1192 (81.66%) |
| All | 3098 | 3645 | 10612 | 1074 | 1460 |
