| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 1 | 
                        pill  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2 | 
                        iud  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 3 | 
                        condom  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 4 | 
                        spermicides  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 7 | 
                        female sterilization  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 10 | 
                        other modern  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 11 | 
                        calendar  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 13 | 
                        wd+calendar  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 19 | 
                        douche  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 20 | 
                        other  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 77 | 
                        none  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 88 | 
                        not sure  | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            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.