| Value | Category | 
                                    
                    
                        | 1 | 1. Small--2 slices | 
                                    
                    
                        | 2 | 2. Medium--4 slices | 
                                    
                    
                        | 3 | 3. Large--6 or more slices | 
                                    
                    
                        | 9 | 9. Don't know | 
                            
            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.