| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
3.6%
|
| 2 | Every few weeks | 10 |
5.1%
|
| 3 | Every few months | 26 |
13.3%
|
| 4 | Not at all | 153 |
78.1%
|
| Sysmiss | 31 |