| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 79 |
5.8%
|
| 2 | 12 years old | 183 |
13.4%
|
| 3 | 13 years old | 338 |
24.8%
|
| 4 | 14 years old | 286 |
21%
|
| 5 | 15 years old | 321 |
23.6%
|
| 6 | 16 years old | 110 |
8.1%
|
| 7 | 17 years old or older | 45 |
3.3%
|
| Sysmiss | 6 |