| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 115 |
4.3%
|
| 2 | 12 years old | 376 |
14.2%
|
| 3 | 13 years old | 645 |
24.3%
|
| 4 | 14 years old | 500 |
18.9%
|
| 5 | 15 years old | 507 |
19.1%
|
| 6 | 16 years old | 425 |
16%
|
| 7 | 17 years old or older | 81 |
3.1%
|
| Sysmiss | 17 |