| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 575 |
39.7%
|
| 1 | yes | 846 |
58.4%
|
| 8 | don't know | 17 |
1.2%
|
| 9 | 11 |
0.8%
|
|
| 11 | .Z | 17305 |