| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 36 |
1.6%
|
| 2 | 12 years old | 151 |
6.9%
|
| 3 | 13 years old | 236 |
10.8%
|
| 4 | 14 years old | 350 |
16%
|
| 5 | 15 years old | 434 |
19.8%
|
| 6 | 16 years old | 430 |
19.6%
|
| 7 | 17 years old or older | 556 |
25.4%
|
| Sysmiss | 12 |