| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 19 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 2 | Weekly | 869 | 
                                                                 
                                    
                                    29.4%
                                 
                                                             | 
                                                        
                    
| 3 | Monthly | 1472 | 
                                                                 
                                    
                                    49.8%
                                 
                                                             | 
                                                        
                    
| 4 | Once every 3 months | 451 | 
                                                                 
                                    
                                    15.3%
                                 
                                                             | 
                                                        
                    
| 5 | Less often | 140 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    
| 6 | Do not know | 6 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 9523 |