| Value | Category | 
                                    
                    
                        | 0 | no education | 
                                    
                    
                        | 1 | primary incomplete | 
                                    
                    
                        | 2 | primary complete | 
                                    
                    
                        | 3 | secondary incomplete | 
                                    
                    
                        | 4 | secondary complete | 
                                    
                    
                        | 5 | higher | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.