| Value | Category | Cases | |
|---|---|---|---|
| 1 | 12 years old | 157 |
9.5%
|
| 2 | 13 years old | 435 |
26.2%
|
| 3 | 14 years old | 484 |
29.2%
|
| 4 | 15 years old | 379 |
22.8%
|
| 5 | 16 years old | 133 |
8%
|
| 6 | 17 years old or older | 71 |
4.3%
|
| Sysmiss | 6 |