| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
1.1%
|
| 2 | Every few weeks | 5 |
5.3%
|
| 3 | Every few months | 17 |
18.1%
|
| 4 | Not at all | 71 |
75.5%
|
| Sysmiss | 13 |