| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
4.1%
|
| 2 | Every few weeks | 35 |
20.5%
|
| 3 | Every few months | 81 |
47.4%
|
| 4 | Not at all | 48 |
28.1%
|
| Sysmiss | 20 |