| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 354 |
3.1%
|
| 2 | 12 years old | 1675 |
14.5%
|
| 3 | 13 years old | 2333 |
20.3%
|
| 4 | 14 years old | 2299 |
20%
|
| 5 | 15 years old | 2054 |
17.8%
|
| 6 | 16 years old | 1920 |
16.7%
|
| 7 | 17 years old or older | 878 |
7.6%
|
| Sysmiss | 72 |