| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 |
2.7%
|
| 2 | Every few weeks | 24 |
8.2%
|
| 3 | Every few months | 121 |
41.3%
|
| 4 | Not at all | 140 |
47.8%
|
| Sysmiss | 75 |