| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
6.6%
|
| 2 | Every few weeks | 27 |
11.2%
|
| 3 | Every few months | 106 |
43.8%
|
| 4 | Not at all | 93 |
38.4%
|
| Sysmiss | 21 |