| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 20 |
6.6%
|
| 2 | Every few weeks | 55 |
18.1%
|
| 3 | Every few months | 131 |
43.1%
|
| 4 | Not at all | 98 |
32.2%
|
| Sysmiss | 51 |