| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 418 |
20.4%
|
| 2 | 12 years old | 553 |
27%
|
| 3 | 13 years old | 504 |
24.6%
|
| 4 | 14 years old | 355 |
17.3%
|
| 5 | 15 years old | 142 |
6.9%
|
| 6 | 16 years old | 51 |
2.5%
|
| 7 | 17 years old or older | 24 |
1.2%
|
| Sysmiss | 21 |