| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
3.3%
|
| 2 | Every few weeks | 35 |
9.6%
|
| 3 | Every few months | 120 |
32.8%
|
| 4 | Not at all | 199 |
54.4%
|
| Sysmiss | 55 |