| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 4 |
2.4%
|
| 2 | Every few weeks | 8 |
4.8%
|
| 3 | Every few months | 51 |
30.9%
|
| 4 | Not at all | 88 |
53.3%
|
| -99 | 14 |
8.5%
|
|
| Sysmiss | 26 |