| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 145 |
4%
|
| 2 | 12 years old | 631 |
17.5%
|
| 3 | 13 years old | 844 |
23.4%
|
| 4 | 14 years old | 844 |
23.4%
|
| 5 | 15 years old | 777 |
21.5%
|
| 6 | 16 years old | 264 |
7.3%
|
| 7 | 17 years old or older | 107 |
3%
|
| Sysmiss | 29 |