| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 11 |
3.1%
|
| 2 | Every few weeks | 29 |
8.1%
|
| 3 | Every few months | 63 |
17.5%
|
| 4 | Not at all | 177 |
49.3%
|
| Sysmiss | 79 |
22%
|