| Value | 
                    Category | 
                                                                            
                                    
                    
                        | -3 | 
                        illegal missing  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -2 | 
                        dont know  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | -1 | 
                        refuse  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 1 | 
                        Friends/relatives  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2 | 
                        Neighborors  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 3 | 
                        Hired labor  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 4 | 
                        Machines  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 5 | 
                        Family members  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 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.