| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 |
0.6%
|
| 2 | Every few weeks | 14 |
8.4%
|
| 3 | Every few months | 97 |
58.4%
|
| 4 | Not at all | 54 |
32.5%
|
| Sysmiss | 25 |