| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 74 |
1.3%
|
| 2 | 12 years old | 357 |
6.2%
|
| 3 | 13 years old | 1597 |
27.8%
|
| 4 | 14 years old | 1558 |
27.2%
|
| 5 | 15 years old | 1233 |
21.5%
|
| 6 | 16 years old | 878 |
15.3%
|
| 7 | 17 years old or older | 38 |
0.7%
|
| Sysmiss | 89 |