| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 789 |
12.2%
|
| 1 | yes | 5645 |
87.5%
|
| 8 | don't know | 10 |
0.2%
|
| 9 | 4 |
0.1%
|
|
| 11 | .Z | 1784 |