| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 1967 |
94.1%
|
| 1 | Several days | 52 |
2.5%
|
| 2 | More than half the days | 14 |
0.7%
|
| 3 | Nearly every day | 58 |
2.8%
|
| Sysmiss | 1508 |