| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 1 | 
                        No school  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2 | 
                        Primary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 3 | 
                        8/9-years school (classes V-IX)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 4 | 
                        Upper secondary - vocational 2-3 yeas  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 5 | 
                        Upper secondary - vocational 4-5 years  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 6 | 
                        Upper Secondary - general  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 7 | 
                        Tertiary (BA)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 8 | 
                        Tertiary (BAMA)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 9 | 
                        Teriary (old system before Bologna)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 10 | 
                        Post university / Master  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 11 | 
                        First Level Master  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 12 | 
                        Second level Master  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 13 | 
                        Doctorate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 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.