| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 164 |
2.5%
|
| 2 | 12 years old | 136 |
2.1%
|
| 3 | 13 years old | 384 |
5.9%
|
| 4 | 14 years old | 961 |
14.7%
|
| 5 | 15 years old | 1496 |
22.8%
|
| 6 | 16 years old | 1701 |
25.9%
|
| 7 | 17 years old or older | 1715 |
26.2%
|
| Sysmiss | 358 |