| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 7403 |
94.7%
|
| 1 | yes | 115 |
1.5%
|
| 8 | don't know | 285 |
3.6%
|
| 9 | 17 |
0.2%
|
|
| 11 | .Z | 412 |