| Value | Category | 
                                    
                    
                        | 1 | No longer eligible | 
                                    
                    
                        | 2 | Went to pay station but not yet on list | 
                                    
                    
                        | 3 | Have not gone to check | 
                                    
                    
                        | 4 | Other (specify) | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 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.