| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (don't know) | 7 |
0.6%
|
| -66 | -66 (refuse to answer) | 4 |
0.4%
|
| 0 | No | 1071 |
96%
|
| 1 | Yes | 34 |
3%
|