Since 2009 the United States is home to the second largest passenger vehicle market of any country in the world, second to China. Overall, there were an estimated 263. 6 million registered vehicles in the United States in 2015, most of which were passenger vehicles. This number, along with the average age of vehicles, has increased steadily since 1960. The United States is also home to three large vehicle manufacturers: General Motors, Ford Motor Company, and Chrysler, which have historically been referred to as the "Big Three".