| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 65 |
3.7%
|
| 2 | 12 years old | 144 |
8.2%
|
| 3 | 13 years old | 449 |
25.7%
|
| 4 | 14 years old | 571 |
32.7%
|
| 5 | 15 years old | 404 |
23.1%
|
| 6 | 16 years old | 82 |
4.7%
|
| 7 | 17 years old or older | 31 |
1.8%
|
| Sysmiss | 39 |