| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 86 |
5.4%
|
| 2 | 13 years old | 322 |
20.3%
|
| 3 | 14 years old | 413 |
26.1%
|
| 4 | 15 years old | 372 |
23.5%
|
| 5 | 16 years old | 188 |
11.9%
|
| 6 | 17 years old | 107 |
6.8%
|
| 7 | 18 years old | 61 |
3.9%
|
| 8 | 19 years old or older | 35 |
2.2%
|
| Sysmiss | 3 |