| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not at all | 2481 |
49.6%
|
| 1 | Several Days | 2038 |
40.7%
|
| 2 | More than half the days | 329 |
6.6%
|
| 3 | Nearly every day | 132 |
2.6%
|
| 99 | Refused | 27 |
0.5%
|