| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
2.8%
|
| 2 | Every few weeks | 62 |
21.8%
|
| 3 | Every few months | 157 |
55.1%
|
| 4 | Not at all | 58 |
20.4%
|
| Sysmiss | 90 |