| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 91 |
5.5%
|
| 2 | 12 years old | 135 |
8.2%
|
| 3 | 13 years old | 397 |
24.1%
|
| 4 | 14 years old | 517 |
31.4%
|
| 5 | 15 years old | 402 |
24.4%
|
| 6 | 16 years old | 87 |
5.3%
|
| 7 | 17 years old or older | 16 |
1%
|
| Sysmiss | 23 |