| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 17 |
0.5%
|
| 2 | 12 years old | 313 |
9.3%
|
| 3 | 13 years old | 691 |
20.4%
|
| 4 | 14 years old | 704 |
20.8%
|
| 5 | 15 years old | 677 |
20%
|
| 6 | 16 years old | 640 |
18.9%
|
| 7 | 17 years old | 268 |
7.9%
|
| 8 | 18 years old or older | 71 |
2.1%
|
| Sysmiss | 4 |