| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 33 |
0.6%
|
| 2 | 12 years old | 640 |
10.9%
|
| 3 | 13 years old | 1278 |
21.7%
|
| 4 | 14 years old | 1216 |
20.7%
|
| 5 | 15 years old | 998 |
17%
|
| 6 | 16 years old | 754 |
12.8%
|
| 7 | 17 years old | 744 |
12.7%
|
| 8 | 18 years old or older | 214 |
3.6%
|
| Sysmiss | 17 |