| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 72 |
3.3%
|
| 2 | 12 years old | 399 |
18.1%
|
| 3 | 13 years old | 544 |
24.6%
|
| 4 | 14 years old | 505 |
22.9%
|
| 5 | 15 years old | 443 |
20.1%
|
| 6 | 16 years old or older | 245 |
11.1%
|
| Sysmiss | 34 |