| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 156 |
3.6%
|
| 2 | 12 years old | 470 |
10.7%
|
| 3 | 13 years old | 939 |
21.4%
|
| 4 | 14 years old | 1164 |
26.5%
|
| 5 | 15 years old | 990 |
22.5%
|
| 6 | 16 years old | 433 |
9.9%
|
| 7 | 17 years old or older | 240 |
5.5%
|
| Sysmiss | 55 |