US DOE EIA:
Transportation was the largest consuming sector of petroleum and the one
showing the greatest expansion. In 2008, 13.7 million barrels per day of
petroleum products were consumed for transportation purposes.
Transportation sector use of energy experienced tremendous growth overall
but registered noticeable pauses in 1974, 1979-1982, 1990 and 1991, 2001
and 2008. In 2008, petroleum accounted for 94 percent of the transportation
sector's total use of energy.
In 2008, 71 percent of all petroleum consumed in the United States was used
to meet transportation requirements; 23 percent went to the industrial sector;
5 percent to the residential and commercial sector; and only 1 percent to