| Value | Category | 
                                    
                    
                        | 1 | Earth, clay | 
                                    
                    
                        | 2 | Wooden planks, bamboo | 
                                    
                    
                        | 3 | Cement | 
                                    
                    
                        | 4 | Parquet, polished wood | 
                                    
                    
                        | 5 | Polished stone, marble | 
                                    
                    
                        | 6 | Vinyl | 
                                    
                    
                        | 7 | Ceramic tiles | 
                                    
                    
                        | 8 | Other | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.