| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 104 |
3.4%
|
| 2 | 12 years old | 372 |
12.2%
|
| 3 | 13 years old | 566 |
18.6%
|
| 4 | 14 years old | 704 |
23.1%
|
| 5 | 15 years old | 737 |
24.2%
|
| 6 | 16 years old | 447 |
14.7%
|
| 7 | 17 years old or older | 120 |
3.9%
|
| Sysmiss | 68 |