| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 44 |
5.8%
|
| -8 | does not apply | 2 |
0.3%
|
| -7 | refused to answer | 4 |
0.5%
|
| 0 | no | 551 |
72.9%
|
| 1 | yes | 155 |
20.5%
|