| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 17 |
1.2%
|
| 2 | 12 years old | 87 |
6.2%
|
| 3 | 13 years old | 321 |
22.7%
|
| 4 | 14 years old | 425 |
30.1%
|
| 5 | 15 years old | 363 |
25.7%
|
| 6 | 16 years old or older | 199 |
14.1%
|
| Sysmiss | 29 |