| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 42 |
1.7%
|
| 2 | 12 years old | 520 |
20.9%
|
| 3 | 13 years old | 585 |
23.6%
|
| 4 | 14 years old | 522 |
21%
|
| 5 | 15 years old | 418 |
16.8%
|
| 6 | 16 years old | 368 |
14.8%
|
| 7 | 17 years old or older | 28 |
1.1%
|
| Sysmiss | 2 |