| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 27 |
6.4%
|
| 2 | Every few weeks | 72 |
17.1%
|
| 3 | Every few months | 141 |
33.6%
|
| 4 | Not at all | 180 |
42.9%
|
| Sysmiss | 55 |