| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 40 |
2.9%
|
| 2 | 13 years old | 341 |
24.8%
|
| 3 | 14 years old | 496 |
36.1%
|
| 4 | 15 years old | 324 |
23.6%
|
| 5 | 16 years old | 126 |
9.2%
|
| 6 | 17 years old or older | 47 |
3.4%
|
| Sysmiss | 4 |