| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 11 |
4.6%
|
| 2 | Every few weeks | 10 |
4.2%
|
| 3 | Every few months | 23 |
9.6%
|
| 4 | Not at all | 196 |
81.7%
|
| Sysmiss | 23 |