| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 403 |
6.7%
|
| 2 | 12 years old | 295 |
4.9%
|
| 3 | 13 years old | 520 |
8.7%
|
| 4 | 14 years old | 1640 |
27.4%
|
| 5 | 15 years old | 1523 |
25.5%
|
| 6 | 16 years old | 1414 |
23.6%
|
| 7 | 17 years old or older | 189 |
3.2%
|
| Sysmiss | 329 |