| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
2.3%
|
| 2 | Every few weeks | 24 |
9.1%
|
| 3 | Every few months | 40 |
15.2%
|
| 4 | Not at all | 193 |
73.4%
|
| Sysmiss | 79 |