| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3340 |
93.7%
|
| 1 | Several days | 178 |
5%
|
| 2 | More than half the days | 36 |
1%
|
| 3 | Nearly every day | 10 |
0.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 2 |
0.1%
|
| Sysmiss | 53 |