| Value | Category | 
                                    
                    
                        | 1 | no school | 
                                    
                    
                        | 2 | some primary | 
                                    
                    
                        | 3 | all primary | 
                                    
                    
                        | 4 | some secondary | 
                                    
                    
                        | 5 | all secondary | 
                                    
                    
                        | 6 | after secondary | 
                                    
                    
                        | 7 | completed univ | 
                                    
                    
                        | 8 | do not know | 
                                    
                    
                        | 9 | do not have | 
                            
            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.