| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 90 |
6.1%
|
| 2 | 12 years old | 173 |
11.6%
|
| 3 | 13 years old | 315 |
21.2%
|
| 4 | 14 years old | 333 |
22.4%
|
| 5 | 15 years old | 347 |
23.3%
|
| 6 | 16 years old | 169 |
11.4%
|
| 7 | 17 years old or older | 60 |
4%
|
| Sysmiss | 8 |