| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 9 |
0.5%
|
| 2 | 12 years old | 39 |
2%
|
| 3 | 13 years old | 233 |
12.1%
|
| 4 | 14 years old | 374 |
19.4%
|
| 5 | 15 years old | 353 |
18.3%
|
| 6 | 16 years old | 253 |
13.1%
|
| 7 | 17 years old | 272 |
14.1%
|
| 8 | 18 years old or older | 399 |
20.7%
|
| Sysmiss | 4 |