| Value | Category | 
                                    
                    
                        | 11 | Earth, sand | 
                                    
                    
                        | 21 | Wood planks | 
                                    
                    
                        | 31 | Parquet, polished wd | 
                                    
                    
                        | 32 | Ceramic Tiles | 
                                    
                    
                        | 33 | Cement | 
                                    
                    
                        | 96 | 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.