| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 3394 |
95.2%
|
| 1 | Several days | 82 |
2.3%
|
| 2 | More than half the days | 9 |
0.3%
|
| 3 | Nearly every day | 2 |
0.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Missing | 79 |
2.2%
|
| Sysmiss | 53 |