| Value | Category | 
                                    
                    
                        | 1 | One | 
                                    
                    
                        | 2 | Two | 
                                    
                    
                        | 3 | Three | 
                                    
                    
                        | 4 | Four | 
                                    
                    
                        | 5 | Five | 
                                    
                    
                        | 6 | Six | 
                                    
                    
                        | 7 | Seven | 
                                    
                    
                        | 8 | Eight | 
                                    
                    
                        | 9 | Nine | 
                                    
                    
                        | 10 | Ten | 
                                    
                    
                        | 11 | Eleven | 
                                    
                    
                        | 12 | Twelve Plus | 
                            
            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.