| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 128 |
5.2%
|
| 2 | 12 years old | 209 |
8.5%
|
| 3 | 13 years old | 488 |
19.9%
|
| 4 | 14 years old | 752 |
30.6%
|
| 5 | 15 years old | 651 |
26.5%
|
| 6 | 16 years old | 189 |
7.7%
|
| 7 | 17 years old or older | 41 |
1.7%
|
| Sysmiss | 4 |