| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.1%
|
| 2 | Every few weeks | 13 |
5.6%
|
| 3 | Every few months | 78 |
33.5%
|
| 4 | Not at all | 137 |
58.8%
|
| Sysmiss | 56 |