| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 75 |
3.7%
|
| 2 | 12 years old | 347 |
17%
|
| 3 | 13 years old | 406 |
19.9%
|
| 4 | 14 years old | 346 |
17%
|
| 5 | 15 years old | 431 |
21.1%
|
| 6 | 16 years old | 298 |
14.6%
|
| 7 | 17 years old or older | 136 |
6.7%
|
| Sysmiss | 12 |