| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old | 82 |
2.2%
|
| 2 | 12 years old | 118 |
3.2%
|
| 3 | 13 years old | 891 |
23.9%
|
| 4 | 14 years old | 1264 |
34%
|
| 5 | 15 years old | 984 |
26.4%
|
| 6 | 16 years old | 313 |
8.4%
|
| 7 | 17 years old or older | 71 |
1.9%
|
| Sysmiss | 138 |