| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 20 |
4.1%
|
| 2 | Every few weeks | 141 |
28.8%
|
| 3 | Every few months | 201 |
41.1%
|
| 4 | Not at all | 127 |
26%
|
| -99 | 36 | ||
| Sysmiss | 55 |