| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 105 |
2.5%
|
| 2 | 12 years old | 386 |
9.1%
|
| 3 | 13 years old | 1091 |
25.7%
|
| 4 | 14 years old | 1293 |
30.4%
|
| 5 | 15 years old | 1050 |
24.7%
|
| 6 | 16 years old | 288 |
6.8%
|
| 7 | 17 years old or older | 39 |
0.9%
|
| Sysmiss | 18 |