| Value | Category | 
                                    
                    
                        | 1 | private registered | 
                                    
                    
                        | 2 | private non registered | 
                                    
                    
                        | 3 | state owned | 
                                    
                    
                        | 4 | mixed | 
                                    
                    
                        | 5 | cooperative | 
                                    
                    
                        | 6 | unknown | 
                                    
                    
                        | 99889988 | refusal | 
                                    
                    
                        | 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.