| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 313 |
3.1%
|
| 2 | 12 years old | 1886 |
18.6%
|
| 3 | 13 years old | 2180 |
21.5%
|
| 4 | 14 years old | 2274 |
22.4%
|
| 5 | 15 years old | 2015 |
19.9%
|
| 6 | 16 years old | 954 |
9.4%
|
| 7 | 17 years old | 340 |
3.4%
|
| 8 | 18 years old or older | 187 |
1.8%
|
| Sysmiss | 26 |