| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 5 |
2.3%
|
| 2 | Every few weeks | 40 |
18.1%
|
| 3 | Every few months | 120 |
54.3%
|
| 4 | Not at all | 56 |
25.3%
|
| Sysmiss | 111 |