| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 67 |
1.9%
|
| 2 | 12 years old | 183 |
5.3%
|
| 3 | 13 years old | 470 |
13.7%
|
| 4 | 14 years old | 541 |
15.7%
|
| 5 | 15 years old | 642 |
18.7%
|
| 6 | 16 years old | 728 |
21.2%
|
| 7 | 17 years old or older | 806 |
23.5%
|
| Sysmiss | 37 |