| Value | Category | 
                                    
                    
                        | 1 | yes, had this income | 
                                    
                    
                        | 2 | no, did not have this income | 
                                    
                    
                        | 3 | had, dont know amount | 
                                    
                    
                        | 4 | had, refuse to tell amount | 
                                    
                    
                        | 9 | dont  know , no answer | 
                            
            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.