| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
4.7%
|
| 2 | Every few weeks | 29 |
22.8%
|
| 3 | Every few months | 67 |
52.8%
|
| 4 | Not at all | 25 |
19.7%
|
| -99 | 3 | ||
| Sysmiss | 29 |