| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all. | 3212 |
96.9%
|
| 1 | Several days | 77 |
2.3%
|
| 2 | More than half the days | 9 |
0.3%
|
| 3 | Nearly every day | 16 |
0.5%
|
| Sysmiss | 2674 |