| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than once a month | 36 | 
                                                                 
                                    
                                    24.7%
                                 
                                                             | 
                                                        
                    
| 2 | Once a month | 65 | 
                                                                 
                                    
                                    44.5%
                                 
                                                             | 
                                                        
                    
| 3 | More than once a month | 45 | 
                                                                 
                                    
                                    30.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 8425 |