| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 15 |
7.2%
|
| 2 | Every few weeks | 29 |
13.9%
|
| 3 | Every few months | 39 |
18.8%
|
| 4 | Not at all | 125 |
60.1%
|
| -99 | 12 | ||
| Sysmiss | 34 |