###HUMAN: For those records from the products and each product's manufacturer, find headquarter and the amount of headquarter , and group by attribute headquarter, and visualize them by a bar chart, and I want to display x axis in descending order please., ###ASSISTANT: SELECT Headquarter, COUNT(Headquarter) FROM Products AS T1 JOIN Manufacturers AS T2 ON T1.Manufacturer = T2.Code GROUP BY Headquarter ORDER BY Headquarter DESC