| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 73 |
3.8%
|
| 2 | 12 years old | 416 |
21.6%
|
| 3 | 13 years old | 613 |
31.8%
|
| 4 | 14 years old | 462 |
24%
|
| 5 | 15 years old | 221 |
11.5%
|
| 6 | 16 years old | 84 |
4.4%
|
| 7 | 17 years old or older | 60 |
3.1%
|
| Sysmiss | 88 |