| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 143 |
3.2%
|
| 2 | 12 years old | 437 |
9.8%
|
| 3 | 13 years old | 1229 |
27.7%
|
| 4 | 14 years old | 1100 |
24.8%
|
| 5 | 15 years old | 884 |
19.9%
|
| 6 | 16 years old | 586 |
13.2%
|
| 7 | 17 years old | 60 |
1.4%
|
| 8 | 18 and over | 0 |
0%
|
| Sysmiss | 243 |