| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1313 |
16.2%
|
| 1 | yes | 6730 |
83%
|
| 8 | don't know | 67 |
0.8%
|
| 9 | 3 |
0%
|
|
| 11 | .Z | 126 |