| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 174 |
3%
|
| 2 | 12 years old | 177 |
3%
|
| 3 | 13 years old | 476 |
8.1%
|
| 4 | 14 years old | 1272 |
21.7%
|
| 5 | 15 years old | 1530 |
26.1%
|
| 6 | 16 years old | 1431 |
24.4%
|
| 7 | 17 years old or older | 804 |
13.7%
|
| Sysmiss | 55 |