From the U.S. Department of Energy:
This is a useful chart. 95% of our petroleum use last year was for transportation. The other energy sources, primarily domestic, are predominantly used in stationary power systems. The information reinforces the idea that the only way to significantly reduce our dependence on foreign oil sources (roughly 65% of the petroleum we use is imported) is to reduce the use of petroleum in the transportation sector, through alternative energy sources for transportation, through higher fuel economy of vehicles, and/or a reduction in the transportation sector (driving less).
A couple of graphs from the 2008 BP Statistical Review of World Energy provide a concise explanation of the problem.
Here’s where the oil is:
Here’s where the oil in consumed:
That pretty much sums up the problem.
Given that 95% of our oil consumption is incurred by transportation, the graph on the left (courtesy of the New York Times) might indicate a large source of the problem.