| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 15 |
3.4%
|
| 2 | Every few weeks | 27 |
6.2%
|
| 3 | Every few months | 124 |
28.4%
|
| 4 | Not at all | 270 |
61.9%
|
| Sysmiss | 131 |