| Value | Category | 
                                    
                    
                        | 1 | Not familiar at all | 
                                    
                    
                        | 2 | 2 | 
                                    
                    
                        | 3 | 3 | 
                                    
                    
                        | 4 | 4 | 
                                    
                    
                        | 5 | 5 | 
                                    
                    
                        | 6 | 6 | 
                                    
                    
                        | 7 | 7 | 
                                    
                    
                        | 8 | 8 | 
                                    
                    
                        | 9 | 9 | 
                                    
                    
                        | 10 | Extremely familiar | 
                                    
                    
                        | 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.