| Value | Category | 
                                    
                    
                        | 0 | No activity/no performance | 
                                    
                    
                        | 1 | Much better | 
                                    
                    
                        | 2 | Better | 
                                    
                    
                        | 3 | Equally good | 
                                    
                    
                        | 4 | Equally worse | 
                                    
                    
                        | 5 | Worse | 
                                    
                    
                        | 6 | Much worse | 
                                    
                    
                        | 7 | Process code | 
                            
            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.