| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 37 |
2.8%
|
| 2 | 13 years old | 210 |
15.8%
|
| 3 | 14 years old | 254 |
19.1%
|
| 4 | 15 years old | 306 |
23.1%
|
| 5 | 16 years old | 210 |
15.8%
|
| 6 | 17 years old or older | 310 |
23.4%
|
| Sysmiss | 11 |