| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 3 |
1.4%
|
| 2 | Every few weeks | 13 |
6.2%
|
| 3 | Every few months | 44 |
21%
|
| 4 | Not at all | 109 |
51.9%
|
| Sysmiss | 41 |
19.5%
|