| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3019 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    
| 2 | Monthly | 1702 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| 3 | Yearly | 725 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    
| 4 | Less often | 3026 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    
| 5 | Not at all | 16295 | 
                                                                 
                                    
                                    65.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 817 |