| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 9 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 2 | Weekly | 18 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 3 | Monthly | 14 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 4 | Less than monthly | 38 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 2599 | 
                                                                 
                                    
                                    97.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1374 |