| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
0.9%
|
| 2 | Every few weeks | 30 |
8.6%
|
| 3 | Every few months | 157 |
45%
|
| 4 | Not at all | 159 |
45.6%
|
| Sysmiss | 17 |