| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 15 |
0.7%
|
| 2 | 12 years old | 469 |
22.2%
|
| 3 | 13 years old | 613 |
29.1%
|
| 4 | 14 years old | 694 |
32.9%
|
| 5 | 15 years old | 266 |
12.6%
|
| 6 | 16 years old | 40 |
1.9%
|
| 7 | 17 years old or older | 12 |
0.6%
|
| Sysmiss | 24 |