| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 9 |
2.8%
|
| 2 | Every few weeks | 23 |
7.1%
|
| 3 | Every few months | 88 |
27.1%
|
| 4 | Not at all | 205 |
63.1%
|
| Sysmiss | 29 |