| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 229 |
2.8%
|
| 2 | 12 years old | 216 |
2.6%
|
| 3 | 13 years old | 710 |
8.6%
|
| 4 | 14 years old | 1851 |
22.4%
|
| 5 | 15 years old | 1826 |
22.1%
|
| 6 | 16 years old | 1688 |
20.4%
|
| 7 | 17 years old | 1160 |
14%
|
| 8 | 18 years old or older | 580 |
7%
|
| Sysmiss | 114 |