| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 26 |
0.4%
|
| 2 | 12 years old | 1230 |
18.9%
|
| 3 | 13 years old | 1941 |
29.8%
|
| 4 | 14 years old | 2138 |
32.8%
|
| 5 | 15 years old | 1074 |
16.5%
|
| 6 | 16 years old | 88 |
1.4%
|
| 7 | 17 years old or older | 13 |
0.2%
|
| Sysmiss | 8 |