| Value | Category | 
                                    
                    
                        | -888 |  | 
                                    
                    
                        | -999 |  | 
                                    
                    
                        | . |  | 
                                    
                    
                        | 1 |  | 
                                    
                    
                        | 1 2 |  | 
                                    
                    
                        | 1 2 3 |  | 
                                    
                    
                        | 1 2 3 4 |  | 
                                    
                    
                        | 1 2 3 4 5 |  | 
                                    
                    
                        | 1 2 3 4 5 6 |  | 
                                    
                    
                        | 1 2 3 4 5 6 7 |  | 
                                    
                    
                        | 1 2 3 4 5 7 |  | 
                                    
                    
                        | 1 2 3 4 6 |  | 
                                    
                    
                        | 1 2 3 4 6 7 |  | 
                                    
                    
                        | 1 2 3 5 |  | 
                                    
                    
                        | 1 2 3 5 6 |  | 
                                    
                    
                        | 1 2 3 5 7 |  | 
                                    
                    
                        | 1 2 3 6 |  | 
                                    
                    
                        | 1 2 3 6 7 |  | 
                                    
                    
                        | 1 2 3 7 |  | 
                                    
                    
                        | 1 2 4 5 6 |  | 
                                    
                    
                        | 1 2 5 |  | 
                                    
                    
                        | 1 2 5 6 |  | 
                                    
                    
                        | 1 2 5 6 7 |  | 
                                    
                    
                        | 1 2 5 7 |  | 
                                    
                    
                        | 1 2 6 |  | 
                                    
                    
                        | 1 2 6 7 |  | 
                                    
                    
                        | 1 2 7 |  | 
                                    
                    
                        | 1 3 |  | 
                                    
                    
                        | 1 3 5 |  | 
                                    
                    
                        | 1 3 7 |  | 
                                    
                    
                        | 1 4 5 7 |  | 
                                    
                    
                        | 1 5 |  | 
                                    
                    
                        | 1 5 7 |  | 
                                    
                    
                        | 1 6 |  | 
                                    
                    
                        | 1 7 |  | 
                                    
                    
                        | 2 |  | 
                                    
                    
                        | 2 3 |  | 
                                    
                    
                        | 2 3 4 |  | 
                                    
                    
                        | 2 3 4 5 |  | 
                                    
                    
                        | 2 3 4 5 6 |  | 
                                    
                    
                        | 2 3 4 5 6 7 |  | 
                                    
                    
                        | 2 3 4 5 7 |  | 
                                    
                    
                        | 2 3 4 6 |  | 
                                    
                    
                        | 2 3 5 |  | 
                                    
                    
                        | 2 3 5 6 |  | 
                                    
                    
                        | 2 3 5 6 7 |  | 
                                    
                    
                        | 2 3 5 7 |  | 
                                    
                    
                        | 2 3 6 |  | 
                                    
                    
                        | 2 3 6 7 |  | 
                                    
                    
                        | 2 3 7 |  | 
                                    
                    
                        | 2 6 |  | 
                                    
                    
                        | 2 7 |  | 
                                    
                    
                        | 3 |  | 
                                    
                    
                        | 3 5 |  | 
                                    
                    
                        | 3 6 |  | 
                                    
                    
                        | 3 7 |  | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 5 6 |  | 
                                    
                    
                        | 7 |  | 
                            
            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.