total us energy demand grows at an average rate of 1 percent a year from 95 to 121 quadrillion btu between 1998 and 2020 improved efficiency using equipment buildings moderates increasing for services transportation is the most rapidly growing sector due personal freight travel petroleum annual 3 with more than 70 used in natural gas 8 growth all sectors but rapid electricity generation coal consumption 0 9 on about 90 increases 4 continued use electric appliances partially offset by domestic crude oil production declines 6 5 million barrels day net imports increase 52 64 as rates 7