| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 163 |
4.2%
|
| 2 | 12 years old | 610 |
15.8%
|
| 3 | 13 years old | 653 |
16.9%
|
| 4 | 14 years old | 765 |
19.8%
|
| 5 | 15 years old | 735 |
19.1%
|
| 6 | 16 years old | 552 |
14.3%
|
| 7 | 17 years old | 306 |
7.9%
|
| 8 | 18 years old or older | 74 |
1.9%
|
| Sysmiss | 11 |