| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 8 |
0.3%
|
| 2 | 12 years old | 27 |
1.1%
|
| 3 | 13 years old | 499 |
20.2%
|
| 4 | 14 years old | 906 |
36.7%
|
| 5 | 15 years old | 942 |
38.2%
|
| 6 | 16 years old or older | 87 |
3.5%
|
| Sysmiss | 58 |