| Value | Category | Cases | |
|---|---|---|---|
| -88 | Other (specify) | 4 |
10.5%
|
| 1 | More than once a month | 10 |
26.3%
|
| 2 | Once a month | 14 |
36.8%
|
| 3 | Once in two-three months | 10 |
26.3%
|
| Sysmiss | 82 |