| Value | Category | Cases | |
|---|---|---|---|
| 0 | no method | 4127 | 
                                                                 
                                    
                                    50.1%
                                 
                                                             | 
                                                        
                    
| 1 | folkloric method | 6 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 2 | traditional method | 1075 | 
                                                                 
                                    
                                    13.1%
                                 
                                                             | 
                                                        
                    
| 3 | modern method | 3024 | 
                                                                 
                                    
                                    36.7%
                                 
                                                             |