| Value | Category | 
                                    
                    
                        | -5 | other | 
                                    
                    
                        | -4 | missing data | 
                                    
                    
                        | -3 | refused to answer | 
                                    
                    
                        | -2 | not applicable | 
                                    
                    
                        | -1 | do not know | 
                                    
                    
                        | 0 | none yet | 
                                    
                    
                        | 1 | sub a/grade 1 | 
                                    
                    
                        | 2 | sub b/grade 2 | 
                                    
                    
                        | 3 | grade 3/standard 1 | 
                                    
                    
                        | 4 | grade 4/standard 2 | 
                                    
                    
                        | 5 | grade 5/standard 3 | 
                                    
                    
                        | 6 | grade 6/standard 4 | 
                                    
                    
                        | 7 | grade 7/standard 5 | 
                                    
                    
                        | 8 | grade 8/standad 6 | 
                                    
                    
                        | 9 | grade 9/standard 7 | 
                                    
                    
                        | 10 | grade 10/standard 8 | 
                                    
                    
                        | 11 | grade 11/standard 9 | 
                                    
                    
                        | 12 | grade 12/standard 10/took matric and failed | 
                                    
                    
                        | 13 | grade 12/standard 10/matric without exemption | 
                                    
                    
                        | 14 | grade 12/standard 10/matric with exemption | 
                                    
                    
                        | 15 | ntc i | 
                                    
                    
                        | 16 | ntc ii | 
                                    
                    
                        | 17 | ntc iii | 
                                    
                    
                        | 18 | degree | 
                                    
                    
                        | 19 | postgraduate  degree or diploma | 
                                    
                    
                        | 21 | grade0/grade r | 
                                    
                    
                        | 22 | dont know | 
                            
            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.