| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 20 |
0.5%
|
| 2 | 12 years old | 524 |
12.6%
|
| 3 | 13 years old | 1222 |
29.3%
|
| 4 | 14 years old | 1199 |
28.8%
|
| 5 | 15 years old | 823 |
19.8%
|
| 6 | 16 years old | 317 |
7.6%
|
| 7 | 17 years old or older | 62 |
1.5%
|
| Sysmiss | 5 |