The American automobile : a centenary

By 1916, American manufacturers were turning out 1 million passenger cars a year and the horse had almost gone. In 1920, production reached 2 million. In 1929, on the eve of the Depression, it was up to 4.4 million. Recovering to 3.7 million in 1941, the last year of peace, output rose to an all-time peak of 9.7 million in 1973.