| Value | Category | 
                                    
                    
                        | 0 | academic degree (at least doctorate) | 
                                    
                    
                        | 10 | Master's degree, doctor's or equivalent degree | 
                                    
                    
                        | 11 | bachelor's or engineer's degree | 
                                    
                    
                        | 12 | college diploma | 
                                    
                    
                        | 20 | graduation certificate, post-secondary school | 
                                    
                    
                        | 31 | vocational high school with a high school dioma | 
                                    
                    
                        | 32 | secondary vocational education without a diploma | 
                                    
                    
                        | 41 | general secondary education with matriculation | 
                                    
                    
                        | 42 | general secondary school without matriculation | 
                                    
                    
                        | 50 | basic vocational | 
                                    
                    
                        | 60 | gymnasium | 
                                    
                    
                        | 70 | basic | 
                                    
                    
                        | 80 | incomplete basic | 
                                    
                    
                        | 90 | without school education | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.