| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 18 |
3.7%
|
| 2 | Every few weeks | 46 |
9.4%
|
| 3 | Every few months | 184 |
37.6%
|
| 4 | Not at all | 242 |
49.4%
|
| Sysmiss | 15 |