| Value | Category | 
                                    
                    
                        | 0 | No method | 
                                    
                    
                        | 1 | Folkloric method | 
                                    
                    
                        | 2 | Traditional method | 
                                    
                    
                        | 3 | Modern method | 
                                    
                    
                        | 8 | Don't know | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.