| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.5%
|
| 2 | Every few weeks | 15 |
11.5%
|
| 3 | Every few months | 30 |
22.9%
|
| 4 | Not at all | 84 |
64.1%
|
| -99 | 4 | ||
| Sysmiss | 25 |