| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 00 | 
                        NIU (not in universe)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 01 | 
                        Armed forces  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 11 | 
                        Legislators and senior officials  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 12 | 
                        Corporate managers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 13 | 
                        General managers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 21 | 
                        Physical, mathematical and engineering professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 22 | 
                        Life science and health professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 23 | 
                        Teaching professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 24 | 
                        Other professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 31 | 
                        Physical and engineering associate professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 32 | 
                        Life science and health associate professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 33 | 
                        Teaching associate professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 34 | 
                        Other associate professionals  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 41 | 
                        Office clerks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 42 | 
                        Customer service clerks  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 51 | 
                        Personal and protective service workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 52 | 
                        Models, salespersons and demonstrators  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 61 | 
                        Agriculture and fishery workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 71 | 
                        Extraction and building trades workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 72 | 
                        Metal, machinery and related trades workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 73 | 
                        Precision, handicraft, printing, and related workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 74 | 
                        Other craft and related trades workers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 81 | 
                        Stationary-plant and related operators  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 82 | 
                        Machine operators and assemblers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 83 | 
                        Drivers and mobile-plant operators  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 91 | 
                        Sales and services elementary occupations  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 92 | 
                        Agriculture, fishery, and related laborers  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 93 | 
                        Laborers in mining, construction, manuf. and transport  | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            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.