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Acknowledgments US Department of Transportation - BTS

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SOURCESU.S. resident population, age, sex, region, metropolitan areas, micropolitan areas:U.S. Census Bureau, Population Division, Population Estimates, available at http://www.census.gov/popest/estbygeo.html as <strong>of</strong> Aug. 27, 2010.Rural / urban:1980-90: Ibid., Statistical Abstract <strong>of</strong> the United States 2000 (Washington, DC: 2001), table 37.2000-06: Ibid., Statistical Abstract <strong>of</strong> the United States 2008 (Washington, DC: 2008), table 29.Immigrants:U.S. <strong>Department</strong> <strong>of</strong> Homeland Security, U.S. Citizenship and Immigration Services, Yearbook <strong>of</strong> Immigration Statistics (Washington, DC: Annual Issues), table 1,available at http://www.dhs.gov/ximgtn/statistics/ as <strong>of</strong> Dec. 29, 2009.Total area:U.S. <strong>Department</strong> <strong>of</strong> Commerce, Bureau <strong>of</strong> the Census, Statistical Abstract <strong>of</strong> the United States 2002 (Washington, DC:2003), table 1.Gross domestic product:1980-97: U.S. <strong>Department</strong> <strong>of</strong> Commerce, Bureau <strong>of</strong> Economic Analysis, National Economic Accounts, National Income and Product Accounts Table, table 1.1.6,available at http://www.bea.gov/national/index.htm as <strong>of</strong> Aug. 30, 2010.1998-2009: U.S. <strong>Department</strong> <strong>of</strong> Commerce, Bureau <strong>of</strong> Economic Analysis, Industry Economic Accounts, Gross-Domestic-Product-by-Industry Accounts, Real ValueAdded by Industry, available at http://www.bea.gov/industry/index.htm as <strong>of</strong> Aug. 30, 2010.Civilian labor force:U.S. <strong>Department</strong> <strong>of</strong> Labor, Bureau <strong>of</strong> Labor Statistics,Current Population Survey, Employment status <strong>of</strong> the civilian noninstitutional population, available athttp://www.bls.gov/cps/cpsaat1.pdf as <strong>of</strong> Aug. 27, 2010.Participation rates:U.S. <strong>Department</strong> <strong>of</strong> Labor, Bureau <strong>of</strong> Labor Statistics, Current Population Survey, Table 2, Employment Status <strong>of</strong> the Civilian Noninstitutional Population 16 yearsand Over by Sex, 1971 to Date, available at http://www.bls.gov/cps/cpsaat2.pdf as <strong>of</strong> Aug. 27, 2010.Number <strong>of</strong> households and average size <strong>of</strong> households:U.S. <strong>Department</strong> <strong>of</strong> Commerce, Bureau <strong>of</strong> the Census, Current Population Survey , Table HH-6, Average Populaton Per Household and Family: 1940 to Present,available at http://www.census.gov/population/www/socdemo/hh-fam.html#ht as <strong>of</strong> Aug. 27, 2010.Mean and Median household income:U.S. <strong>Department</strong> <strong>of</strong> Commerce, Bureau <strong>of</strong> the Census, Current Population Survey, Historical Income Tables, table H-6. Regions--All Races by Median and MeanIncome: 1975 to 2009, available at http://www.census.gov/hhes/www/income/data/historical/index.html as <strong>of</strong> Oct. 30, 2010.Average household expenditures:U.S <strong>Department</strong> <strong>of</strong> Labor, Bureau <strong>of</strong> Labor Statistics, Consumer Expenditure Survey, Average Annual Expenditures, All Consumer Units, available athttp://www.bls.gov/data/home.htm as <strong>of</strong> Oct. 29, 2010.

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