| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
1.3%
|
| 2 | Every few weeks | 27 |
6%
|
| 3 | Every few months | 154 |
34.1%
|
| 4 | Not at all | 264 |
58.5%
|
| Sysmiss | 54 |