| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 16 |
1.1%
|
| 2 | 12 years old | 29 |
2%
|
| 3 | 13 years old | 287 |
20%
|
| 4 | 14 years old | 516 |
36%
|
| 5 | 15 years old | 497 |
34.7%
|
| 6 | 16 years old | 83 |
5.8%
|
| 7 | 17 years old | 4 |
0.3%
|
| 8 | 18 and over | 0 |
0%
|
| Sysmiss | 19 |