| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.5%
|
| 2 | Every few weeks | 12 |
7.6%
|
| 3 | Every few months | 31 |
19.7%
|
| 4 | Not at all | 110 |
70.1%
|
| Sysmiss | 43 |