| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 7 |
0.9%
|
| -8 | does not apply | 745 |
98.5%
|
| -7 | refused to answer | 0 |
0%
|
| 1 | 3 |
0.4%
|
|
| 3 | 1 |
0.1%
|