| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 23 | 
                                    
                                    8.6%
                                 | 
| 2 | Every few weeks | 45 | 
                                    
                                    16.7%
                                 | 
| 3 | Every few months | 70 | 
                                    
                                    26%
                                 | 
| 4 | Not at all | 131 | 
                                    
                                    48.7%
                                 | 
| Sysmiss | 50 |