| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 105 |
5.3%
|
| 2 | 12 years old | 474 |
23.8%
|
| 3 | 13 years old | 606 |
30.5%
|
| 4 | 14 years old | 591 |
29.7%
|
| 5 | 15 years old | 177 |
8.9%
|
| 6 | 16 years old | 22 |
1.1%
|
| 7 | 17 years old or older | 13 |
0.7%
|
| Sysmiss | 87 |