| Value | Category | Cases | |
|---|---|---|---|
| 1 | 11 years old or younger | 828 |
14.6%
|
| 2 | 12 years old | 1346 |
23.7%
|
| 3 | 13 years old | 1252 |
22.1%
|
| 4 | 14 years old | 1130 |
19.9%
|
| 5 | 15 years old | 917 |
16.2%
|
| 6 | 16 years old | 183 |
3.2%
|
| 7 | 17 years old or older | 20 |
0.4%
|
| Sysmiss | 47 |