| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 66 |
2.9%
|
| 2 | 12 years old | 121 |
5.4%
|
| 3 | 13 years old | 338 |
14.9%
|
| 4 | 14 years old | 522 |
23.1%
|
| 5 | 15 years old | 540 |
23.9%
|
| 6 | 16 years old | 390 |
17.2%
|
| 7 | 17 years old or older | 284 |
12.6%
|
| Sysmiss | 40 |