| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 56 |
1.5%
|
| 2 | 12 years old | 542 |
15%
|
| 3 | 13 years old | 780 |
21.6%
|
| 4 | 14 years old | 779 |
21.5%
|
| 5 | 15 years old | 739 |
20.4%
|
| 6 | 16 years old | 401 |
11.1%
|
| 7 | 17 years old | 278 |
7.7%
|
| 8 | 18 years old or older | 44 |
1.2%
|
| Sysmiss | 12 |