| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
9.4%
|
| 2 | Every few weeks | 41 |
32%
|
| 3 | Every few months | 61 |
47.7%
|
| 4 | Not at all | 14 |
10.9%
|
| -99 | 2 | ||
| Sysmiss | 29 |