| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 2 |
0%
|
| -8 | does not apply | 0 |
0%
|
| -7 | refused to answer | 0 |
0%
|
| 0 | no | 4077 |
98.9%
|
| 1 | yes | 42 |
1%
|