| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 3 |
0.1%
|
| 2 | 12 years old | 2 |
0.1%
|
| 3 | 13 years old | 542 |
18.7%
|
| 4 | 14 years old | 652 |
22.5%
|
| 5 | 15 years old | 659 |
22.7%
|
| 6 | 16 years old | 557 |
19.2%
|
| 7 | 17 years old | 483 |
16.6%
|
| 8 | 18 years old or older | 5 |
0.2%
|
| Sysmiss | 6 |