| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 20 |
0.5%
|
| 2 | 12 years old | 424 |
10.9%
|
| 3 | 13 years old | 1073 |
27.5%
|
| 4 | 14 years old | 1129 |
28.9%
|
| 5 | 15 years old | 746 |
19.1%
|
| 6 | 16 years old | 370 |
9.5%
|
| 7 | 17 years old or older | 142 |
3.6%
|
| Sysmiss | 11 |