| Value | Category | Cases | |
|---|---|---|---|
| 0 | not at all | 2092 |
68.5%
|
| 1 | several days | 665 |
21.8%
|
| 2 | more than half the days | 157 |
5.1%
|
| 3 | nearly every day | 133 |
4.4%
|
| 99 | refused to answer | 8 |
0.3%
|