| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3383 |
94.9%
|
| 1 | Several days | 160 |
4.5%
|
| 2 | More than half the days | 13 |
0.4%
|
| 3 | Nearly every day | 3 |
0.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 7 |
0.2%
|
| Sysmiss | 53 |