| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily or almost daily | 25 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    
| 2 | Weekly | 21 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 3 | Monthly | 33 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    
| 4 | Less than monthly | 124 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    
| 5 | Never | 3396 | 
                                                                 
                                    
                                    94.4%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1208 |