| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 4 |
0.5%
|
| -8 | does not apply | 0 |
0%
|
| -7 | refused to answer | 0 |
0%
|
| 0 | none | 488 |
64.6%
|
| 1 | 258 |
34.1%
|
|
| 2 | 2 |
0.3%
|
|
| 3 | 1 |
0.1%
|
|
| 4 | 2 |
0.3%
|
|
| 9 | 1 |
0.1%
|