| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.2%
|
| 2 | Every few weeks | 14 |
3.1%
|
| 3 | Every few months | 68 |
15.3%
|
| 4 | Not at all | 362 |
81.3%
|
| Sysmiss | 60 |