| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 114 |
9.3%
|
| 2 | 12 years old | 133 |
10.8%
|
| 3 | 13 years old | 340 |
27.7%
|
| 4 | 14 years old | 328 |
26.7%
|
| 5 | 15 years old | 232 |
18.9%
|
| 6 | 16 years old | 46 |
3.7%
|
| 7 | 17 years old or older | 36 |
2.9%
|
| Sysmiss | 68 |