| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all. | 3011 |
90.8%
|
| 1 | Several days | 209 |
6.3%
|
| 2 | More than half the days | 22 |
0.7%
|
| 3 | Nearly every day | 74 |
2.2%
|
| Sysmiss | 2672 |