| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 6 |
4.2%
|
| 2 | Every few weeks | 13 |
9.1%
|
| 3 | Every few months | 21 |
14.7%
|
| 4 | Not at all | 102 |
71.3%
|
| -99 | 1 |
0.7%
|
|
| Sysmiss | 22 |