| Value | Category | 
                                    
                    
                        | 1 | Wood frame | 
                                    
                    
                        | 2 | Cement or concrete block | 
                                    
                    
                        | 3 | Prefabricated | 
                                    
                    
                        | 9 | Other material | 
                                    
                    
                        | 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.