| Value | Category | 
                                    
                    
                        | -9 | don't know | 
                                    
                    
                        | 1 | not at all important | 
                                    
                    
                        | 2 | slightly important | 
                                    
                    
                        | 3 | fairly important | 
                                    
                    
                        | 4 | very important | 
                            
            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.