| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than once a month | 656 | 
                                                                 
                                    
                                    28.3%
                                 
                                                             | 
                                                        
                    
| 2 | Once a month | 765 | 
                                                                 
                                    
                                    33%
                                 
                                                             | 
                                                        
                    
| 3 | More than once a month | 895 | 
                                                                 
                                    
                                    38.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 6255 |