| Value | Category | Cases | |
|---|---|---|---|
| 0 | not at all | 2558 |
83.7%
|
| 1 | several days | 358 |
11.7%
|
| 2 | more than half the days | 75 |
2.5%
|
| 3 | nearly every day | 51 |
1.7%
|
| 99 | refused to answer | 13 |
0.4%
|