| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 24 |
0.8%
|
| 2 | 12 years old | 311 |
10.7%
|
| 3 | 13 years old | 871 |
29.9%
|
| 4 | 14 years old | 918 |
31.5%
|
| 5 | 15 years old | 658 |
22.6%
|
| 6 | 16 years old or older | 130 |
4.5%
|
| Sysmiss | 6 |