| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
2.2%
|
| 2 | Every few weeks | 14 |
15.2%
|
| 3 | Every few months | 51 |
55.4%
|
| 4 | Not at all | 25 |
27.2%
|
| Sysmiss | 19 |