| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
7.3%
|
| 2 | Every few weeks | 33 |
20%
|
| 3 | Every few months | 58 |
35.2%
|
| 4 | Not at all | 49 |
29.7%
|
| -99 | 13 |
7.9%
|
|
| Sysmiss | 26 |