| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 45 |
1.9%
|
| 2 | 12 years old | 158 |
6.8%
|
| 3 | 13 years old | 287 |
12.4%
|
| 4 | 14 years old | 450 |
19.5%
|
| 5 | 15 years old | 559 |
24.2%
|
| 6 | 16 years old | 531 |
23%
|
| 7 | 17 years old or older | 280 |
12.1%
|
| Sysmiss | 6 |