| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 188 |
2.6%
|
| 2 | 12 years old | 1016 |
14.2%
|
| 3 | 13 years old | 1541 |
21.6%
|
| 4 | 14 years old | 1485 |
20.8%
|
| 5 | 15 years old | 1313 |
18.4%
|
| 6 | 16 years old | 1088 |
15.2%
|
| 7 | 17 years old | 416 |
5.8%
|
| 8 | 18 years old or older | 90 |
1.3%
|
| Sysmiss | 4 |