KEY: GDP = Gross Domestic Product (in chained 2000 dollars).
NOTE: To make it easier to compare data of differing magnitudes over time, the Bureau of Transportation Statistics divided the data for all years in each category (see table 14-2b in appendix B) by the initial year value and multiplied the result by 100.
SOURCES: U.S. Department of Energy (USDOE), Energy Information Administration (EIA), Monthly Energy Review, table 2.1, available at http://www.eia.doe.gov/mer/, as of April 2005. GDP—U.S. Department of Commerce, Bureau of Economic Analysis, National Income and Product Account tables, available at http://www.bea.gov/, as of April 2005.