| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.5%
|
| 2 | Every few weeks | 23 |
14.4%
|
| 3 | Every few months | 56 |
35%
|
| 4 | Not at all | 77 |
48.1%
|
| -99 | 12 | ||
| Sysmiss | 32 |