| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 2 |
1.5%
|
| 2 | Every few weeks | 10 |
7.5%
|
| 3 | Every few months | 43 |
32.1%
|
| 4 | Not at all | 79 |
59%
|
| Sysmiss | 28 |