| Value | Category | 
                                    
                    
                        | A |  | 
                                    
                    
                        | AB |  | 
                                    
                    
                        | ABC |  | 
                                    
                    
                        | ABD |  | 
                                    
                    
                        | ABDEF |  | 
                                    
                    
                        | ABE |  | 
                                    
                    
                        | ABEF |  | 
                                    
                    
                        | ABF |  | 
                                    
                    
                        | ABX |  | 
                                    
                    
                        | AC |  | 
                                    
                    
                        | ACE |  | 
                                    
                    
                        | AD |  | 
                                    
                    
                        | AE |  | 
                                    
                    
                        | AEF |  | 
                                    
                    
                        | AEX |  | 
                                    
                    
                        | AF |  | 
                                    
                    
                        | AX |  | 
                                    
                    
                        | B |  | 
                                    
                    
                        | BC |  | 
                                    
                    
                        | BD |  | 
                                    
                    
                        | BE |  | 
                                    
                    
                        | BF |  | 
                                    
                    
                        | BX |  | 
                                    
                    
                        | C |  | 
                                    
                    
                        | CD |  | 
                                    
                    
                        | CE |  | 
                                    
                    
                        | CF |  | 
                                    
                    
                        | CFX |  | 
                                    
                    
                        | CX |  | 
                                    
                    
                        | D |  | 
                                    
                    
                        | DF |  | 
                                    
                    
                        | DX |  | 
                                    
                    
                        | E |  | 
                                    
                    
                        | EX |  | 
                                    
                    
                        | F |  | 
                                    
                    
                        | X |  | 
                                    
                    
                        | Y |  | 
                            
            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.