| Value | Category | 
                                    
                    
                        | 0 | Not working | 
                                    
                    
                        | 1 | Armed forces and police corps | 
                                    
                    
                        | 11 | Chief executives, senior officials and legislators | 
                                    
                    
                        | 12 | Managing directors and chief executives | 
                                    
                    
                        | 21 | Specialists in natural sciences, mathematics, and engineering | 
                                    
                    
                        | 22 | Specialists in life sciences and health | 
                                    
                    
                        | 23 | Specialits in the field of education | 
                                    
                    
                        | 24 | Other specialists | 
                                    
                    
                        | 31 | Assistant specialists in natural sciences and engineering | 
                                    
                    
                        | 32 | Technicians in health life sciences | 
                                    
                    
                        | 33 | Technicians in the field of education | 
                                    
                    
                        | 34 | Other technicians | 
                                    
                    
                        | 41 | Librarians | 
                                    
                    
                        | 42 | Bookkeepers | 
                                    
                    
                        | 51 | Service workers and transporters | 
                                    
                    
                        | 52 | Salespersons | 
                                    
                    
                        | 61 | Skilled agriculture and fishing workers | 
                                    
                    
                        | 62 | Agricultural and fishing workers | 
                                    
                    
                        | 71 | Professionals in extraction and construction | 
                                    
                    
                        | 72 | Professionals in metallurgy and machinery | 
                                    
                    
                        | 73 | Workers in detailed professions, manual professions, and printers and assimilated industry | 
                                    
                    
                        | 74 | Professionals and other workers | 
                                    
                    
                        | 81 | Fixed industrial units operators | 
                                    
                    
                        | 82 | Workers in operating and assembly of machinery | 
                                    
                    
                        | 83 | Conductors and operators of moving machinery | 
                                    
                    
                        | 91 | Unskilled salespersons | 
                                    
                    
                        | 92 | Unskilled agrucaltural and fishing workers | 
                                    
                    
                        | 93 | Unskilled miners, workers in construction, processing industry, and transportation | 
                                    
                    
                        | 94 | Water fetchers | 
                                    
                    
                        | 97 | Student | 
                                    
                    
                        | 98 | Don't know | 
                                    
                    
                        | 996 | 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.