| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
3.3%
|
| 2 | Every few weeks | 13 |
4.7%
|
| 3 | Every few months | 68 |
24.8%
|
| 4 | Not at all | 184 |
67.2%
|
| Sysmiss | 29 |