| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
5.5%
|
| 2 | Every few weeks | 15 |
11.8%
|
| 3 | Every few months | 53 |
41.7%
|
| 4 | Not at all | 52 |
40.9%
|
| -99 | 3 | ||
| Sysmiss | 29 |