| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1758 |
83.9%
|
| 1 | yes | 330 |
15.7%
|
| 8 | don't know | 1 |
0%
|
| 9 | 7 |
0.3%
|
|
| 11 | .Z | 6136 |