| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 40 |
1.1%
|
| 2 | 12 years old | 637 |
18.2%
|
| 3 | 13 years old | 1025 |
29.2%
|
| 4 | 14 years old | 977 |
27.9%
|
| 5 | 15 years old | 513 |
14.6%
|
| 6 | 16 years old | 199 |
5.7%
|
| 7 | 17 years old or older | 117 |
3.3%
|
| Sysmiss | 7 |