| Value | Category | 
                                    
                    
                        | 1 | Paille, herbes, chaume | 
                                    
                    
                        | 2 | Terre | 
                                    
                    
                        | 3 | Bois, planche | 
                                    
                    
                        | 4 | Toles | 
                                    
                    
                        | 5 | Beton, ciment | 
                                    
                    
                        | 6 | Autre | 
                                    
                    
                        | 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.