| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 16 |
12.6%
|
| 2 | Every few weeks | 27 |
21.3%
|
| 3 | Every few months | 65 |
51.2%
|
| 4 | Not at all | 19 |
15%
|
| -99 | 3 | ||
| Sysmiss | 29 |