| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 186 |
4.7%
|
| 2 | 12 years old | 255 |
6.5%
|
| 3 | 13 years old | 500 |
12.7%
|
| 4 | 14 years old | 735 |
18.6%
|
| 5 | 15 years old | 754 |
19.1%
|
| 6 | 16 years old | 788 |
19.9%
|
| 7 | 17 years old or older | 732 |
18.5%
|
| Sysmiss | 197 |