| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 1 | 
                                    
                                    1.1%
                                 | 
| 2 | Every few weeks | 2 | 
                                    
                                    2.1%
                                 | 
| 3 | Every few months | 30 | 
                                    
                                    31.9%
                                 | 
| 4 | Not at all | 61 | 
                                    
                                    64.9%
                                 | 
| Sysmiss | 28 |