(Bloomberg) -- Passenger vehicle sales in China jumped 33 percent in 2010 as government incentives helped the nation stay the world's largest auto market for the second straight year.Deliveries of passenger cars, MPVs and SUVs increased to 13.8 million units, up from 10.3 million units in 2009, according to the China Association of Automobile Manufacturers.China's total vehicle sales, which include trucks and buses, rose 32 percent to 18 million units.The United States trailed China last year with sales of 11.6 million units, up 11 percent over 2009. U.S. light-vehicle sales peaked in 2000 at 17.4 million vehicles.Over the past decade, China's annual vehicle sales jumped ten-fold as rising affluence and government incentives boosted demand.The pace of growth may slow in 2011 after the nation withdrew tax breaks and rural subsidies that helped it overtake the U.S., said Jenny Gu, an analyst at J.D. Power & Associates."The pace of sales growth in the past two years was abnormal and driven by government policies," said Shanghai-based Gu. "With the removal of those incentives, passenger-car growth may fall to about 10 percent a year during the next four years."Total auto sales in China may reach 20 million in 2011, according to forecasts by Booz & Co. and Nomura Holdings Inc.This month, China's government raised the sales tax on vehicles with engines of 1.6 liters or smaller to 10 percent, up from 7.5 percent in 2010. The central government also phased out scrappage subsidies and sales incentives for rural residents.