| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 177 |
8.8%
|
| 2 | 12 years old | 375 |
18.6%
|
| 3 | 13 years old | 573 |
28.4%
|
| 4 | 14 years old | 452 |
22.4%
|
| 5 | 15 years old | 282 |
14%
|
| 6 | 16 years old | 106 |
5.3%
|
| 7 | 17 years old or older | 52 |
2.6%
|
| Sysmiss | 32 |