| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 20 |
1.2%
|
| 2 | 12 years old | 64 |
3.8%
|
| 3 | 13 years old | 232 |
13.6%
|
| 4 | 14 years old | 230 |
13.5%
|
| 5 | 15 years old | 334 |
19.6%
|
| 6 | 16 years old | 393 |
23.1%
|
| 7 | 17 years old or older | 428 |
25.2%
|
| Sysmiss | 27 |