| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 2 |
0%
|
|
| 1 | Not at all | 16573 |
65.5%
|
| 2 | Several days | 6397 |
25.3%
|
| 3 | More than half the days | 378 |
1.5%
|
| 4 | Nearly every day | 1964 |
7.8%
|
| Sysmiss | 17072 |