| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
4.3%
|
| 2 | Every few weeks | 47 |
12.6%
|
| 3 | Every few months | 113 |
30.4%
|
| 4 | Not at all | 196 |
52.7%
|
| Sysmiss | 49 |