| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 6 |
0.2%
|
| 2 | 12 years old | 144 |
5.5%
|
| 3 | 13 years old | 543 |
20.7%
|
| 4 | 14 years old | 627 |
23.9%
|
| 5 | 15 years old | 570 |
21.7%
|
| 6 | 16 years old | 425 |
16.2%
|
| 7 | 17 years old | 181 |
6.9%
|
| 8 | 18 years old or older | 131 |
5%
|
| Sysmiss | 1 |