| Value | Category | 
                                    
                    
                        | 0 | Not weighed | 
                                    
                    
                        | 1 | From written card | 
                                    
                    
                        | 2 | From mother's recall | 
                                    
                    
                        | 8 | Don't know | 
                                    
                    
                        | 9 | Special answers | 
                            
            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.