| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
3.4%
|
| 2 | Every few weeks | 9 |
7.6%
|
| 3 | Every few months | 49 |
41.5%
|
| 4 | Not at all | 56 |
47.5%
|
| Sysmiss | 29 |