| Value | Category | 
                                    
                    
                        | 99996 | 99996. Exceeds max measurement possible | 
                                    
                    
                        | 99997 | 99997. Respondent disabled | 
                                    
                    
                        | 99998 | 99998. Refused | 
                            
            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.