| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 39 |
2.7%
|
| 2 | 13 years old | 204 |
14%
|
| 3 | 14 years old | 307 |
21.1%
|
| 4 | 15 years old | 340 |
23.4%
|
| 5 | 16 years old | 213 |
14.6%
|
| 6 | 17 years old or older | 351 |
24.1%
|
| Sysmiss | 23 |