| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 100 |
4.4%
|
| 2 | 12 years old | 285 |
12.6%
|
| 3 | 13 years old | 591 |
26.1%
|
| 4 | 14 years old | 676 |
29.8%
|
| 5 | 15 years old | 375 |
16.5%
|
| 6 | 16 years old | 172 |
7.6%
|
| 7 | 17 years old or older | 68 |
3%
|
| Sysmiss | 33 |