| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 23 |
0.7%
|
| 2 | 12 years old | 157 |
5.1%
|
| 3 | 13 years old | 488 |
15.7%
|
| 4 | 14 years old | 683 |
22%
|
| 5 | 15 years old | 644 |
20.8%
|
| 6 | 16 years old | 587 |
18.9%
|
| 7 | 17 years old | 397 |
12.8%
|
| 8 | 18 years old or older | 122 |
3.9%
|
| Sysmiss | 48 |