| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, more than monthly | 43 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, monthly | 24 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 3 | Yes, several times but less than monthly | 44 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| 4 | Yes, once or twice | 112 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    
| 5 | No | 4544 | 
                                                                 
                                    
                                    95.3%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 40 |