| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 127 |
3.6%
|
| 2 | 12 years old | 686 |
19.6%
|
| 3 | 13 years old | 800 |
22.8%
|
| 4 | 14 years old | 784 |
22.4%
|
| 5 | 15 years old | 731 |
20.8%
|
| 6 | 16 years old | 272 |
7.8%
|
| 7 | 17 years old | 67 |
1.9%
|
| 8 | 18 years old or older | 40 |
1.1%
|
| Sysmiss | 13 |