| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 23 |
4.8%
|
| 2 | Every few weeks | 42 |
8.7%
|
| 3 | Every few months | 141 |
29.2%
|
| 4 | Not at all | 245 |
50.7%
|
| Sysmiss | 32 |
6.6%
|