| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 469 |
57.4%
|
| 1 | Several days | 300 |
36.7%
|
| 2 | 34 |
4.2%
|
|
| 3 | More than half of the days | 12 |
1.5%
|
| 4 | Nearly every day | 1 |
0.1%
|
| 7 | 1 |
0.1%
|
|
| Sysmiss | 4 |