| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 122 |
4.2%
|
| 2 | 12 years old | 241 |
8.3%
|
| 3 | 13 years old | 537 |
18.4%
|
| 4 | 14 years old | 721 |
24.7%
|
| 5 | 15 years old | 615 |
21.1%
|
| 6 | 16 years old | 293 |
10%
|
| 7 | 17 years old or older | 391 |
13.4%
|
| Sysmiss | 2 |