| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once a week or more | 61 |
6.4%
|
| 2 | Once every two weeks | 80 |
8.4%
|
| 3 | Once a month | 232 |
24.5%
|
| 4 | Never or almost never | 574 |
60.6%
|
| Sysmiss | 53 |