| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 107 |
3.9%
|
| 2 | 12 years old | 230 |
8.4%
|
| 3 | 13 years old | 578 |
21%
|
| 4 | 14 years old | 590 |
21.5%
|
| 5 | 15 years old | 566 |
20.6%
|
| 6 | 16 years old | 459 |
16.7%
|
| 7 | 17 years old or older | 217 |
7.9%
|
| Sysmiss | 36 |