| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
0.6%
|
| 2 | Every few weeks | 21 |
6.1%
|
| 3 | Every few months | 86 |
24.8%
|
| 4 | Not at all | 238 |
68.6%
|
| Sysmiss | 19 |