| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 71 |
1.1%
|
| 2 | 12 years old | 581 |
9.1%
|
| 3 | 13 years old | 1780 |
27.7%
|
| 4 | 14 years old | 2046 |
31.9%
|
| 5 | 15 years old | 1288 |
20.1%
|
| 6 | 16 years old | 468 |
7.3%
|
| 7 | 17 years old or older | 182 |
2.8%
|
| Sysmiss | 11 |