| Value | Category | 
                                    
                    
                        |  | NIU (not in universe) | 
                                    
                    
                        | 1 | Head of household is disabled | 
                                    
                    
                        | 2 | Head of household and one additional person are disabled | 
                                    
                    
                        | 3 | Head of household and 2 or more additional persons are disabled | 
                                    
                    
                        | 4 | Head of household is not disabled, there is one disabled person | 
                                    
                    
                        | 5 | Head of household is not disabled, there are 2 or more disabled persons | 
                                    
                    
                        | 6 | One-person household and that person is disabled | 
                                    
                    
                        | 7 | Two-person household and both persons are disabled | 
                                    
                    
                        | 8 | Three or more persons in the household and all of them are disabled | 
                                    
                    
                        | 9 | Unknown or no persons disabled | 
                            
            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.