| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 288 |
9.6%
|
| 2 | 12 years old | 391 |
13%
|
| 3 | 13 years old | 462 |
15.4%
|
| 4 | 14 years old | 447 |
14.9%
|
| 5 | 15 years old | 436 |
14.5%
|
| 6 | 16 years old | 466 |
15.5%
|
| 7 | 17 years old or older | 508 |
16.9%
|
| Sysmiss | 138 |