| Value | Category | 
                                    
                    
                        | 1 | MUCH WORSE | 
                                    
                    
                        | 2 | WORSE | 
                                    
                    
                        | 3 | ABOUT THE SAME | 
                                    
                    
                        | 4 | BETTER | 
                                    
                    
                        | 5 | MUCH BETTER | 
                                    
                    
                        | 9 | NOT APPLICABLE | 
                                    
                    
                        | 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.