| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 10 |
1.7%
|
| 2 | Every few weeks | 60 |
9.9%
|
| 3 | Every few months | 145 |
23.9%
|
| 4 | Not at all | 340 |
56.1%
|
| Sysmiss | 51 |
8.4%
|