| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 00 | 
                        NIU (not in universe)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 10 | 
                        None  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 11 | 
                        Preschool  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 21 | 
                        Grade 1 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 22 | 
                        Grade 2 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 23 | 
                        Grade 3 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 24 | 
                        Grade 4 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 25 | 
                        Grade 5 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 26 | 
                        Grade 6 (primary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 30 | 
                        Lower secondary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 31 | 
                        Grade 7 (lower secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 32 | 
                        Grade 8 (lower secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 33 | 
                        Grade 9 (lower secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 34 | 
                        Lower secondary completed  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 40 | 
                        Upper secondary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 41 | 
                        Grade 10 (upper secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 42 | 
                        Grade 11 (upper secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 43 | 
                        Grade 12 (upper secondary)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 44 | 
                        Upper secondary completed  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 50 | 
                        Secondary technical/vocational  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 61 | 
                        Post-secondary technical/vocational  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 62 | 
                        Bachelor, incomplete  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 63 | 
                        Bachelor, graduate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 64 | 
                        Graduate program  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 70 | 
                        Other  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 99 | 
                        Unknown  | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            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.