| Value | Category | 
                                    
                    
                        | 1 | JANUARY | 
                                    
                    
                        | 2 | FEBRUARY | 
                                    
                    
                        | 3 | MARCH | 
                                    
                    
                        | 4 | APRIL | 
                                    
                    
                        | 5 | MAY | 
                                    
                    
                        | 6 | JUNE | 
                                    
                    
                        | 7 | JULY | 
                                    
                    
                        | 8 | AUGUST | 
                                    
                    
                        | 9 | SEPTEMBER | 
                                    
                    
                        | 10 | OCTOBER | 
                                    
                    
                        | 11 | NOVEMBER | 
                                    
                    
                        | 12 | DECEMBER | 
                                    
                    
                        | 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.