| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
2.2%
|
| 2 | Every few weeks | 18 |
13%
|
| 3 | Every few months | 43 |
31.2%
|
| 4 | Not at all | 74 |
53.6%
|
| Sysmiss | 15 |