United States oil consumption in 2012 will be about 4.7 million barrels a day, or 20%, lower than it would have been, if the pre-2005 trend in oil consumption growth of 1.5% per year had continued. This drop in consumption is no doubt related to a rise in oil prices starting about 2004.

via Why is US Oil Consumption Lower? Better Gasoline Mileage? | Our Finite World.