| Value | Category | Cases | |
|---|---|---|---|
| 0 | not at all | 2122 |
69.5%
|
| 1 | several days | 657 |
21.5%
|
| 2 | more than half the days | 142 |
4.6%
|
| 3 | nearly every day | 127 |
4.2%
|
| 99 | refused to answer | 7 |
0.2%
|