| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 389 |
6.4%
|
| 2 | 12 years old | 435 |
7.2%
|
| 3 | 13 years old | 1186 |
19.5%
|
| 4 | 14 years old | 1589 |
26.2%
|
| 5 | 15 years old | 1430 |
23.5%
|
| 6 | 16 years old | 716 |
11.8%
|
| 7 | 17 years old or older | 328 |
5.4%
|
| Sysmiss | 257 |