| Value | Category | 
                                    
                    
                        | 1 | Pills | 
                                    
                    
                        | 2 | Loop/IUD | 
                                    
                    
                        | 4 | Depoprovera | 
                                    
                    
                        | 8 | Condom | 
                                    
                    
                        | 16 | Laparoscopy | 
                                    
                    
                        | 32 | Vasectomy | 
                                    
                    
                        | 64 | Foam | 
                                    
                    
                        | 128 | Norplant | 
                            
            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.