| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
2.6%
|
| 2 | Every few weeks | 27 |
8.9%
|
| 3 | Every few months | 172 |
56.6%
|
| 4 | Not at all | 97 |
31.9%
|
| Sysmiss | 92 |