| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
3.2%
|
| 2 | Every few weeks | 4 |
4.3%
|
| 3 | Every few months | 18 |
19.1%
|
| 4 | Not at all | 69 |
73.4%
|
| Sysmiss | 28 |