| Value | Category | 
                                    
                    
                        | 1 | a great deal | 
                                    
                    
                        | 2 | quite a lot | 
                                    
                    
                        | 3 | not very much | 
                                    
                    
                        | 4 | none at all | 
                                    
                    
                        | 8 | uncertain dont know | 
                                    
                    
                        | 9 | refused-no answer | 
                            
            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.