Task: Question Generation
Input (English): Passage: Chevrolet sales in Western and Central Europe ranged around 200,000 units per year since 2005, peaking at 216,160 units in 2007, while the market share achieved its highest of 1.28 percent in 2012. In Russia, sales grew constantly over the same period, from 67,000 units in 2005 to 205,040 units in 2012, Chevrolet holding a market share of 6.84 percent and being the top import car brand. In 2012, the top markets for Chevrolet in Europe, by the number of registrations, were Italy (31,150), Germany (29,694), France (24,613), Turkey (18,492) and Spain (15,165). The best selling model during the same year was the Chevrolet Aveo (54,800), followed by the Chevrolet Spark (47,600) and the Chevrolet Cruze (40,500).
Output (English): How many different countries in Europe were the top markets for Chevrolet by the number of registrations?