| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2888 |
97%
|
| 1 | Several days | 62 |
2.1%
|
| 2 | More than half the days | 11 |
0.4%
|
| 3 | Nearly every day | 16 |
0.5%
|
| Sysmiss | 4044 |