| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 36 |
1.8%
|
| 2 | 12 years old | 116 |
5.8%
|
| 3 | 13 years old | 333 |
16.8%
|
| 4 | 14 years old | 435 |
21.9%
|
| 5 | 15 years old | 416 |
21%
|
| 6 | 16 years old | 326 |
16.4%
|
| 7 | 17 years old or older | 322 |
16.2%
|
| Sysmiss | 7 |