| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 2 |
0%
|
|
| 1 | Not at all | 16477 |
65.1%
|
| 2 | Several days | 6514 |
25.7%
|
| 3 | More than half the days | 287 |
1.1%
|
| 4 | Nearly every day | 2034 |
8%
|
| Sysmiss | 17072 |