| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 30 |
1.5%
|
| 2 | 12 years old | 115 |
5.7%
|
| 3 | 13 years old | 432 |
21.4%
|
| 4 | 14 years old | 494 |
24.5%
|
| 5 | 15 years old | 492 |
24.4%
|
| 6 | 16 years old or older | 455 |
22.5%
|
| Sysmiss | 20 |