| Value | Category | 
                                    
                    
                        | 1 | First cousion on father side | 
                                    
                    
                        | 2 | First cousion on mother side | 
                                    
                    
                        | 3 | Second cousion | 
                                    
                    
                        | 4 | Other blood relative | 
                                    
                    
                        | 5 | Relative by marriage | 
                                    
                    
                        | 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.