| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
1.9%
|
| 2 | 12 years old | 188 |
9%
|
| 3 | 13 years old | 492 |
23.6%
|
| 4 | 14 years old | 478 |
22.9%
|
| 5 | 15 years old | 465 |
22.3%
|
| 6 | 16 years old | 337 |
16.2%
|
| 7 | 17 years old or older | 86 |
4.1%
|
| Sysmiss | 46 |