| Value | Category | 
                                    
                    
                        | 1 | Mud-bonded bricks/stones | 
                                    
                    
                        | 2 | Cement-bonded bricks/stone | 
                                    
                    
                        | 3 | Concerete | 
                                    
                    
                        | 4 | Mud | 
                                    
                    
                        | 5 | Wood/Branches | 
                                    
                    
                        | 6 | 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.