| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
0.9%
|
| 2 | Every few weeks | 15 |
6.8%
|
| 3 | Every few months | 81 |
36.8%
|
| 4 | Not at all | 122 |
55.5%
|
| Sysmiss | 112 |