| Value | Category | 
                                    
                    
                        | 0 | None or < ISCED 1 | 
                                    
                    
                        | 1 | ISCED 1 | 
                                    
                    
                        | 2 | ISCED 2 | 
                                    
                    
                        | 3 | ISCED 3A-B | 
                                    
                    
                        | 4 | ISCED 4A-B | 
                                    
                    
                        | 5 | ISCED 5B | 
                                    
                    
                        | 6 | ISCED 5A, bachelor | 
                                    
                    
                        | 7 | ISCED 5A, master | 
                                    
                    
                        | 8 | ISCED 6 | 
                                    
                    
                        | 9 | DK | 
                                    
                    
                        | 10 | RF | 
                            
            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.