| Value | Category | 
                                    
                    
                        | 1 | 1. Grade 1/Sub A | 
                                    
                    
                        | 2 | 2. Grade 2/Sub B | 
                                    
                    
                        | 3 | 3. Grade 3/Standard 1 | 
                                    
                    
                        | 4 | 4. Grade 4/Standard 2 | 
                                    
                    
                        | 5 | 5. Grade 5/Standard 3 | 
                                    
                    
                        | 6 | 6. Grade 6/Standard 4 | 
                                    
                    
                        | 7 | 7. Grade 7/Standard 5 | 
                                    
                    
                        | 8 | 8. Grade 8/Standard 6 | 
                                    
                    
                        | 9 | 9. Grade 9/Standard 7 | 
                                    
                    
                        | 10 | 10. Grade 10/Standard 8 | 
                                    
                    
                        | 11 | 11. Grade 11/Standard 9 | 
                                    
                    
                        | 12 | 12. Grade 12/Standard 10/Matric | 
                                    
                    
                        | 25 | 25. Other | 
                                    
                    
                        | 95 | 95. No schooling/Grade 0/Little Sub A | 
                                    
                    
                        | 99 | 99. Don't 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.