| Value | Category | 
                                    
                    
                        | -99 | Refused to answer | 
                                    
                    
                        | -88 | Not provided | 
                                    
                    
                        | -77 | Not applicable | 
                                    
                    
                        | -66 | Do not know | 
                                    
                    
                        | 1 | No education | 
                                    
                    
                        | 2 | Started but did not complete primary school | 
                                    
                    
                        | 3 | Primary school | 
                                    
                    
                        | 4 | Started but did not complete secondary school | 
                                    
                    
                        | 5 | Secondary School | 
                                    
                    
                        | 6 | Vocational Training | 
                                    
                    
                        | 7 | Some university training | 
                                    
                    
                        | 8 | Graduate degree (BA, BSc, etc) | 
                                    
                    
                        | 9 | MBA from university in this country | 
                                    
                    
                        | 10 | MBA from university in another country | 
                                    
                    
                        | 11 | Other post graduate degree from university this country | 
                                    
                    
                        | 12 | Other post graduate degree from university other country | 
                            
            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.