| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 7 |
3.2%
|
| 2 | Every few weeks | 12 |
5.5%
|
| 3 | Every few months | 29 |
13.4%
|
| 4 | Not at all | 169 |
77.9%
|
| Sysmiss | 40 |