The Rise and Fall of American Growth: The U.S. Standard of Living since the Civil War (The Princeton Economic History of the Western World Book 70)

by Robert J. Gordon

The ratio of vehicle fatalities per 100 million miles traveled hit its peak of forty-five as early as 1909 and by 1922 had already fallen by half to twenty-two and again by half to eleven by 1939. The rate in 2008 was only 1.3, smaller by a factor of ten than in 1939