| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 477 |
4.2%
|
| 2 | 12 years old | 447 |
3.9%
|
| 3 | 13 years old | 402 |
3.5%
|
| 4 | 14 years old | 2121 |
18.6%
|
| 5 | 15 years old | 3059 |
26.8%
|
| 6 | 16 years old | 3142 |
27.6%
|
| 7 | 17 years old or older | 1756 |
15.4%
|
| Sysmiss | 226 |