| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
2.2%
|
| 2 | 12 years old | 229 |
12.5%
|
| 3 | 13 years old | 400 |
21.8%
|
| 4 | 14 years old | 382 |
20.8%
|
| 5 | 15 years old | 347 |
18.9%
|
| 6 | 16 years old | 330 |
17.9%
|
| 7 | 17 years old or older | 111 |
6%
|
| Sysmiss | 14 |