| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1876 |
57.6%
|
| 2 | Once or twice a year | 808 |
24.8%
|
| 3 | Monthly | 307 |
9.4%
|
| 4 | More often than monthly | 264 |
8.1%
|
| Sysmiss | 37 |