| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
2.5%
|
| 2 | Every few weeks | 40 |
16.6%
|
| 3 | Every few months | 81 |
33.6%
|
| 4 | Not at all | 114 |
47.3%
|
| Sysmiss | 53 |