| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 56 |
2.7%
|
| 2 | 12 years old | 445 |
21.2%
|
| 3 | 13 years old | 726 |
34.5%
|
| 4 | 14 years old | 549 |
26.1%
|
| 5 | 15 years old | 264 |
12.6%
|
| 6 | 16 years old | 48 |
2.3%
|
| 7 | 17 years old or older | 15 |
0.7%
|
| Sysmiss | 62 |