| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 8 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 2 | Every few weeks | 44 | 
                                                                 
                                    
                                    15.5%
                                 
                                                             | 
                                                        
                    
| 3 | Every few months | 90 | 
                                                                 
                                    
                                    31.7%
                                 
                                                             | 
                                                        
                    
| 4 | Not at all | 142 | 
                                                                 
                                    
                                    50%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 91 |