| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 312 |
2.8%
|
| 2 | 12 years old | 2573 |
23.2%
|
| 3 | 13 years old | 3214 |
29%
|
| 4 | 14 years old | 3098 |
27.9%
|
| 5 | 15 years old | 1288 |
11.6%
|
| 6 | 16 years old | 451 |
4.1%
|
| 7 | 17 years old or older | 163 |
1.5%
|
| Sysmiss | 14 |