| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
2.4%
|
| 2 | Every few weeks | 72 |
24.2%
|
| 3 | Every few months | 151 |
50.8%
|
| 4 | Not at all | 67 |
22.6%
|
| -99 | 7 | ||
| Sysmiss | 56 |