"Table 4-1 U.S. Water Transportation Gross Output, 2002-2006",,,,,, (billions of dollars),,,,,, Components,2002,2003,2004,2005,2006,Percent Change 2002-06 Gross Output, 28.1 , 31.3 , 36.3 , 37.3 , 37.9 ,34.9 Intermediate Inputs, 21.1 , 22.6 , 26.8 , 28.0 , 28.0 ,32.7 Energy Inputs, 1.1 , 1.5 , 2.4 , 3.5 , 3.4 ,209.1 Energy Inputs as a % of gross output, 3.9 , 4.8 , 6.6 , 9.4 , 9.0 ,131.8 Material, 1.4 , 1.5 , 1.8 , 1.8 , 2.0 ,42.9 Services, 18.6 , 19.7 , 22.6 , 22.8 , 22.6 ,21.5 Value Added, 7.0 , 8.7 , 9.5 , 9.2 , 9.9 ,41.4 Labor , 3.8 , 3.8 , 4.3 , 4.6 , 5.0 ,31.6 Taxes less subsidies, 0.2 , 0.3 , (0.2), 0.2 , 0.1 ,-50.0 Operating surplus, 3.0 , 4.6 , 5.5 , 4.4 , 4.9 ,63.3 "SOURCE: U.S. Bureau of Economic Analysis, Gross Domestic Product by Industry Accounts. Detailed data available at www.bea.gov.",,,,,,