| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 50 |
0.6%
|
| 2 | 12 years old | 74 |
0.8%
|
| 3 | 13 years old | 651 |
7.3%
|
| 4 | 14 years old | 1669 |
18.8%
|
| 5 | 15 years old | 2005 |
22.6%
|
| 6 | 16 years old | 1832 |
20.6%
|
| 7 | 17 years old | 1314 |
14.8%
|
| 8 | 18 years old or older | 1285 |
14.5%
|
| Sysmiss | 55 |