In the first five months of 2010, auto sales in the U.S. rose to 4.6 million cars and light trucks, an increase of 17% from a year earlier. The rise was mainly caused by the return of commercial customers that had all but stopped buying in 2009 during the recession. Sales to individual customers at dealerships have increased 13%, while fleet sales have jumped 32%.[52] Ford reported that 37% of its sales in May came from fleet sales when it announced its sales for the month increased 23%.[53] In the first seven months of 2010, vehicle sales of Ford increased 24%, including retail and fleet sales. Fleet sales of Ford for the same period rose 35% to 386,000 units while retail sales increase 19%. Fleet sales account for 39 percent of Chrysler's sales and 31 percent for GM's.[54]