| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 43 |
3.1%
|
| 2 | 12 years old | 163 |
11.8%
|
| 3 | 13 years old | 430 |
31.3%
|
| 4 | 14 years old | 449 |
32.6%
|
| 5 | 15 years old | 260 |
18.9%
|
| 6 | 16 years old | 25 |
1.8%
|
| 7 | 17 years old or older | 6 |
0.4%
|
| Sysmiss | 38 |