| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 625 |
12.2%
|
| 2 | 12 years old | 974 |
19%
|
| 3 | 13 years old | 1171 |
22.9%
|
| 4 | 14 years old | 1098 |
21.4%
|
| 5 | 15 years old | 688 |
13.4%
|
| 6 | 16 years old | 412 |
8%
|
| 7 | 17 years old or older | 153 |
3%
|
| Sysmiss | 14 |