| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 452 |
7.3%
|
| 2 | 12 years old | 874 |
14.2%
|
| 3 | 13 years old | 1443 |
23.4%
|
| 4 | 14 years old | 1482 |
24%
|
| 5 | 15 years old | 1136 |
18.4%
|
| 6 | 16 years old | 649 |
10.5%
|
| 7 | 17 years old or older | 135 |
2.2%
|
| Sysmiss | 331 |