| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
3.2%
|
| 2 | Every few weeks | 7 |
7.4%
|
| 3 | Every few months | 53 |
56.4%
|
| 4 | Not at all | 31 |
33%
|
| Sysmiss | 20 |