| Value | Category | 
                                    
                    
                        | 1 | First enterprise operating | 
                                    
                    
                        | 2 | Second enterprise operating | 
                                    
                    
                        | 3 | First enterprise not operating | 
                                    
                    
                        | 4 | Second enterprise not operating | 
                            
            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.