| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
3%
|
| 2 | Every few weeks | 5 |
5%
|
| 3 | Every few months | 60 |
60%
|
| 4 | Not at all | 32 |
32%
|
| Sysmiss | 13 |