| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 0 |
0%
|
| -8 | does not apply | 0 |
0%
|
| -7 | refused to answer | 2 |
0%
|
| 0 | never | 4000 |
97.1%
|
| 1 | a few times | 99 |
2.4%
|
| 2 | often | 13 |
0.3%
|
| 3 | almost always | 6 |
0.1%
|
| 4 | once | 1 |
0%
|