| Value | Category | 
                                    
                    
                        | 1 | 1st category | 
                                    
                    
                        | 2 | 2nd category | 
                                    
                    
                        | 3 | 3rd category | 
                                    
                    
                        | 4 | 4th category | 
                                    
                    
                        | 5 | Appelled | 
                                    
                    
                        | 6 | 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.