| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 143 |
8.8%
|
| 2 | 12 years old | 210 |
13%
|
| 3 | 13 years old | 427 |
26.3%
|
| 4 | 14 years old | 481 |
29.7%
|
| 5 | 15 years old | 308 |
19%
|
| 6 | 16 years old | 39 |
2.4%
|
| 7 | 17 years old or older | 13 |
0.8%
|
| Sysmiss | 79 |