| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 12 |
0.6%
|
| 2 | 12 years old | 315 |
14.6%
|
| 3 | 13 years old | 643 |
29.7%
|
| 4 | 14 years old | 660 |
30.5%
|
| 5 | 15 years old | 423 |
19.6%
|
| 6 | 16 years old or older | 110 |
5.1%
|
| Sysmiss | 24 |