| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week or more | 81 |
8.6%
|
| 2 | Once every two weeks | 51 |
5.4%
|
| 3 | Once a month | 175 |
18.5%
|
| 4 | Never or almost never | 639 |
67.5%
|
| Sysmiss | 54 |