| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 000 | 
                        NIU (not in universe)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 100 | 
                        None  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 200 | 
                        Primary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 210 | 
                        Less than primary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 220 | 
                        Primary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 230 | 
                        Middle  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 300 | 
                        Secondary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 310 | 
                        Matric  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 320 | 
                        Intermediate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 400 | 
                        Tertiary  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 410 | 
                        Bachelors degree  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 420 | 
                        Post-graduate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 421 | 
                        MA / MSCc and above  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 422 | 
                        Bsc and above (engineering)  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 423 | 
                        MBBS / BDS and above  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 424 | 
                        LLB and above  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 430 | 
                        Diploma or certificate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 431 | 
                        Diploma  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 432 | 
                        Certificate  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 500 | 
                        Others  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 999 | 
                        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.