| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 15 |
0.5%
|
| 2 | 12 years old | 452 |
16.4%
|
| 3 | 13 years old | 841 |
30.4%
|
| 4 | 14 years old | 871 |
31.5%
|
| 5 | 15 years old | 511 |
18.5%
|
| 6 | 16 years old or older | 72 |
2.6%
|
| Sysmiss | 5 |