| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 28 |
1.9%
|
| 2 | 12 years old | 222 |
15.4%
|
| 3 | 13 years old | 426 |
29.6%
|
| 4 | 14 years old | 402 |
28%
|
| 5 | 15 years old | 264 |
18.4%
|
| 6 | 16 years old | 79 |
5.5%
|
| 7 | 17 years old or older | 16 |
1.1%
|
| Sysmiss | 15 |