| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 86 |
4.8%
|
| 2 | 12 years old | 255 |
14.4%
|
| 3 | 13 years old | 566 |
31.9%
|
| 4 | 14 years old | 417 |
23.5%
|
| 5 | 15 years old | 227 |
12.8%
|
| 6 | 16 years old | 185 |
10.4%
|
| 7 | 17 years old or older | 40 |
2.3%
|
| Sysmiss | 29 |