| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 22 |
1.7%
|
| 2 | 12 years old | 17 |
1.3%
|
| 3 | 13 years old | 27 |
2.1%
|
| 4 | 14 years old | 164 |
12.9%
|
| 5 | 15 years old | 244 |
19.2%
|
| 6 | 16 years old | 381 |
30%
|
| 7 | 17 years old or older | 416 |
32.7%
|
| Sysmiss | 164 |