| Value | Category | 
                                    
                    
                        | 1 | LESS THAN A MONTH | 
                                    
                    
                        | 2 | 1-2 MONTHS | 
                                    
                    
                        | 3 | 3-4 MONTHS | 
                                    
                    
                        | 4 | 5-12 MONTHS | 
                                    
                    
                        | 5 | MORE THAN A YEAR | 
                                    
                    
                        | 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.