| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 484 |
12.2%
|
| 2 | 12 years old | 721 |
18.2%
|
| 3 | 13 years old | 770 |
19.4%
|
| 4 | 14 years old | 754 |
19%
|
| 5 | 15 years old | 611 |
15.4%
|
| 6 | 16 years old | 376 |
9.5%
|
| 7 | 17 years old or older | 244 |
6.2%
|
| Sysmiss | 111 |