| Value | Category | 
                                    
                    
                        | 1 | 01. Self-emp | 
                                    
                    
                        | 4 | 04. Govt wkr | 
                                    
                    
                        | 5 | 05. Pvt wkr | 
                                    
                    
                        | 6 | 06. Fam wkr | 
                                    
                    
                        | 98 | 98. DK | 
                                    
                    
                        | 99 | 99. Missing | 
                                    
                    
                        | 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.