| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 34 |
1.6%
|
| 2 | 12 years old | 223 |
10.8%
|
| 3 | 13 years old | 360 |
17.5%
|
| 4 | 14 years old | 510 |
24.7%
|
| 5 | 15 years old | 577 |
28%
|
| 6 | 16 years old | 294 |
14.3%
|
| 7 | 17 years old or older | 63 |
3.1%
|
| Sysmiss | 24 |