US energy facts

Though accounting for only 5 percent of the world's population, Americans consume more than 21.7 percent of the world primary energy (2005). Total world energy consumption is a bit more than 462 quadrillion (1015) Btu and US consume almost 101 quadrillion (1015) Btu.The United States was self-sufficient in energy until the late 1950s when energy consumption began to outpace domestic production.