| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
1.8%
|
| 2 | Every few weeks | 78 |
15.8%
|
| 3 | Every few months | 296 |
60%
|
| 4 | Not at all | 110 |
22.3%
|
| -99 | 34 | ||
| 11 | 1 | ||
| Sysmiss | 52 |