| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
3.4%
|
| 2 | Every few weeks | 16 |
7.9%
|
| 3 | Every few months | 66 |
32.5%
|
| 4 | Not at all | 114 |
56.2%
|
| Sysmiss | 66 |