| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.3%
|
| 2 | Every few weeks | 27 |
9%
|
| 3 | Every few months | 98 |
32.7%
|
| 4 | Not at all | 174 |
58%
|
| Sysmiss | 96 |