After China's entry into the World Trade Organization (WTO) in 2001, the development of the automobile market accelerated further. Between 2002 and 2007, China's national automobile market grew by an average 21 percent, or one million vehicles year-on-year.[9] In 2009, China produced 13.79 million automobiles, of which 8 million were passenger cars and 3.41 million were commercial vehicles and surpassed the United States as the world's largest automobile producer by volume. In 2010, both sales and production topped 18 million units, with 13.76 million passenger cars delivered, in each case the largest by any nation in history.[10] In 2014, total vehicle production in China reached 23.720 million, accounting for 26% of global automotive production.[11]