| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 56 |
1.8%
|
| 2 | 12 years old | 454 |
14.7%
|
| 3 | 13 years old | 899 |
29.1%
|
| 4 | 14 years old | 892 |
28.9%
|
| 5 | 15 years old | 684 |
22.1%
|
| 6 | 16 years old or older | 105 |
3.4%
|
| Sysmiss | 12 |