| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 290 |
10.9%
|
| 2 | 12 years old | 570 |
21.5%
|
| 3 | 13 years old | 658 |
24.8%
|
| 4 | 14 years old | 587 |
22.2%
|
| 5 | 15 years old | 368 |
13.9%
|
| 6 | 16 years old or older | 176 |
6.6%
|
| Sysmiss | 20 |