| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
1.3%
|
| 2 | Every few weeks | 28 |
9.2%
|
| 3 | Every few months | 94 |
30.9%
|
| 4 | Not at all | 178 |
58.6%
|
| Sysmiss | 92 |