| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 123 |
6.2%
|
| 2 | 12 years old | 288 |
14.6%
|
| 3 | 13 years old | 470 |
23.8%
|
| 4 | 14 years old | 474 |
24%
|
| 5 | 15 years old | 417 |
21.1%
|
| 6 | 16 years old | 135 |
6.8%
|
| 7 | 17 years old or older | 69 |
3.5%
|
| Sysmiss | 36 |