| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 19 |
1%
|
| 2 | 12 years old | 379 |
19.7%
|
| 3 | 13 years old | 584 |
30.4%
|
| 4 | 14 years old | 622 |
32.3%
|
| 5 | 15 years old | 266 |
13.8%
|
| 6 | 16 years old | 42 |
2.2%
|
| 7 | 17 years old or older | 11 |
0.6%
|
| Sysmiss | 38 |