| Value | Category | 
                                    
                    
                        | 0 | No schooling and no formal education | 
                                    
                    
                        | 1 | Some schooling but not completed even P.1 | 
                                    
                    
                        | 11 | Completed P.1 | 
                                    
                    
                        | 12 | Completed P.2 | 
                                    
                    
                        | 13 | Completed P.3 | 
                                    
                    
                        | 14 | Completed P.4 | 
                                    
                    
                        | 15 | Completed P.5 | 
                                    
                    
                        | 16 | Completed P.6 | 
                                    
                    
                        | 17 | Completed P.7 | 
                                    
                    
                        | 21 | Completed J.1 | 
                                    
                    
                        | 22 | Completed J.2 | 
                                    
                    
                        | 23 | Completed J.3 | 
                                    
                    
                        | 31 | Completed S.1 | 
                                    
                    
                        | 32 | Completed S.2 | 
                                    
                    
                        | 33 | Completed S.3 | 
                                    
                    
                        | 34 | Completed S.4 or 'O' level | 
                                    
                    
                        | 35 | Completed S.5 | 
                                    
                    
                        | 36 | Completed S.6 or 'A' level | 
                                    
                    
                        | 41 | Completed Post primary/ specialised training or cerificate | 
                                    
                    
                        | 51 | Completed Post secondary/ specialised training or diploma | 
                                    
                    
                        | 61 | Completed General degree | 
                                    
                    
                        | 71 | Completed specialised or technical degree | 
                                    
                    
                        | 81 | Completed post-graduate degree or diploma | 
                                    
                    
                        | 91 | Completed Doctorate or Post doctorate research degree | 
                            
            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.