| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 77 |
3.5%
|
| 2 | 12 years old | 124 |
5.7%
|
| 3 | 13 years old | 271 |
12.4%
|
| 4 | 14 years old | 418 |
19.1%
|
| 5 | 15 years old | 552 |
25.2%
|
| 6 | 16 years old or older | 747 |
34.1%
|
| Sysmiss | 68 |