| Value | Category | 
                                    
                    
                        | 1 | Beaten earth | 
                                    
                    
                        | 2 | Hardened dung | 
                                    
                    
                        | 3 | Wooden floor | 
                                    
                    
                        | 4 | Clay tiles | 
                                    
                    
                        | 5 | Cement | 
                                    
                    
                        | 6 | Bricks | 
                                    
                    
                        | 7 | Other | 
                            
            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.