| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 72 |
3.8%
|
| 2 | 12 years old | 268 |
14%
|
| 3 | 13 years old | 341 |
17.9%
|
| 4 | 14 years old | 311 |
16.3%
|
| 5 | 15 years old | 350 |
18.3%
|
| 6 | 16 years old | 431 |
22.6%
|
| 7 | 17 years old or older | 137 |
7.2%
|
| Sysmiss | 13 |