| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 3 |
0.4%
|
| -8 | does not apply | 0 |
0%
|
| -7 | refused to answer | 0 |
0%
|
| 0 | none | 423 |
56%
|
| 1 | 281 |
37.2%
|
|
| 2 | 32 |
4.2%
|
|
| 3 | 9 |
1.2%
|
|
| 4 | 4 |
0.5%
|
|
| 5 | 1 |
0.1%
|
|
| 6 | 2 |
0.3%
|
|
| 8 | 1 |
0.1%
|