| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 31 |
1.6%
|
| 2 | 12 years old | 369 |
19.5%
|
| 3 | 13 years old | 444 |
23.5%
|
| 4 | 14 years old | 435 |
23%
|
| 5 | 15 years old | 413 |
21.9%
|
| 6 | 16 years old | 153 |
8.1%
|
| 7 | 17 years old or older | 45 |
2.4%
|
| Sysmiss | 9 |