| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 210 |
9.3%
|
| 2 | 12 years old | 154 |
6.8%
|
| 3 | 13 years old | 454 |
20.1%
|
| 4 | 14 years old | 302 |
13.4%
|
| 5 | 15 years old | 458 |
20.3%
|
| 6 | 16 years old | 456 |
20.2%
|
| 7 | 17 years old or older | 222 |
9.8%
|
| Sysmiss | 41 |