| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 63 |
4.1%
|
| 2 | 13 years old | 317 |
20.5%
|
| 3 | 14 years old | 394 |
25.5%
|
| 4 | 15 years old | 446 |
28.9%
|
| 5 | 16 years old | 207 |
13.4%
|
| 6 | 17 years old | 67 |
4.3%
|
| 7 | 18 years old | 27 |
1.7%
|
| 8 | 19 years old or older | 22 |
1.4%
|
| Sysmiss | 17 |