| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
3.3%
|
| 2 | Every few weeks | 51 |
10.5%
|
| 3 | Every few months | 223 |
45.7%
|
| 4 | Not at all | 198 |
40.6%
|
| Sysmiss | 17 |