| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 152 |
1.8%
|
| 2 | 12 years old | 1459 |
16.9%
|
| 3 | 13 years old | 2135 |
24.7%
|
| 4 | 14 years old | 2157 |
24.9%
|
| 5 | 15 years old | 1271 |
14.7%
|
| 6 | 16 years old | 683 |
7.9%
|
| 7 | 17 years old or older | 795 |
9.2%
|
| Sysmiss | 83 |