| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
2.7%
|
| 2 | Every few weeks | 30 |
6.7%
|
| 3 | Every few months | 112 |
25.1%
|
| 4 | Not at all | 293 |
65.5%
|
| Sysmiss | 120 |