| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.6%
|
| 2 | Every few weeks | 28 |
21.9%
|
| 3 | Every few months | 76 |
59.4%
|
| 4 | Not at all | 22 |
17.2%
|
| Sysmiss | 38 |