NOTES: The value of 2011 coal exports ($9.42 bilion) from Mobile, AL, Charleston, SC, and Norfolk, VA are considered proprietary information and are consolidated. In this figure, the total value of coal exports for the above three cities are included under the Atlantic Coast Customs District.
SOURCES: 1951-1970: U.S. Department of Commerce, Census Bureau, Historical Statistics of the United States, Colonial Times to 1970, Bicentennial Edition (Washington, DC: 1975); 1970-2000: U.S. Department of Commerce, Census Bureau, Statistical Abstract of the United States (Washington, DC: annual issues); 2000-2011: U.S. Department of Commerce, Census Bureau, Foreign Trade Division, FT920 - U.S. Merchandise Trade: Selected Highlights (Washington, DC: annual issues). Implicit GDP Deflator: U.S. Department of Commerce, Bureau of Economic Analysis, Current-Dollar and “Real” Gross Domestic Product, available at www.bea.gov as of August 2012 as cited in U.S. Department of Transportation, Federal Highway Administration, Freight Facts and Figures 2012, available at http://ops.fhwa.dot.gov/freight/freight_analysis/nat_freight_stats/ as of February 2013.