| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 19 |
0.7%
|
| 2 | 12 years old | 199 |
7.4%
|
| 3 | 13 years old | 456 |
17.1%
|
| 4 | 14 years old | 558 |
20.9%
|
| 5 | 15 years old | 535 |
20%
|
| 6 | 16 years old | 502 |
18.8%
|
| 7 | 17 years old | 327 |
12.2%
|
| 8 | 18 years old or older | 77 |
2.9%
|
| Sysmiss | 1 |