| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 19 |
3.9%
|
| 2 | Every few weeks | 76 |
15.7%
|
| 3 | Every few months | 178 |
36.9%
|
| 4 | Not at all | 210 |
43.5%
|
| -99 | 40 | ||
| 11 | 1 | ||
| Sysmiss | 56 |