| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 14 |
0.9%
|
| 2 | 12 years old | 24 |
1.5%
|
| 3 | 13 years old | 107 |
6.7%
|
| 4 | 14 years old | 512 |
31.8%
|
| 5 | 15 years old | 698 |
43.4%
|
| 6 | 16 years old | 219 |
13.6%
|
| 7 | 17 years old or older | 35 |
2.2%
|
| Sysmiss | 38 |