| Value | Category | Cases | |
|---|---|---|---|
| -9 | refused to answer | 0 |
0%
|
| -8 | don't know | 7 |
3.2%
|
| 0 | if none write | 203 |
94%
|
| 10 | 2 |
0.9%
|
|
| 20 | 2 |
0.9%
|
|
| 34 | 1 |
0.5%
|
|
| 200 | 1 |
0.5%
|