| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 265 |
4.1%
|
| 2 | 12 years old | 457 |
7.1%
|
| 3 | 13 years old | 1076 |
16.7%
|
| 4 | 14 years old | 1589 |
24.6%
|
| 5 | 15 years old | 1363 |
21.1%
|
| 6 | 16 years old | 1027 |
15.9%
|
| 7 | 17 years old or older | 678 |
10.5%
|
| Sysmiss | 44 |