"Table 13
Private Business Investment in Transportation by Transportation Industry vs. by Non-Transportation Industries, Average for 1977-2000",,,,,,,,,,,,,,,,,,,,,,,,
,Transportation industry,Non-transportation industries,Total Transportation ,,,,,,,,,,,,,,,,,,,,,
As % of gross private fixed investment,4.2,6.7,10.9,,,,,,,,,,,,,,,,,,,,,
As % of GDP,0.7,1.1,1.7,,,,,,,,,,,,,,,,,,,,,
"Sources: 
BTS calculations based on data from U.S. Department of Commerce, Bureau of Economic Analysis (BEA), ""Fixed Assets and Consumer Durables,"" ""National Income and Product Account (NIPA) Tables,"" available at http://www.bea.gov, as of July 2002.",,,,,,,,,,,,,,,,,,,,,,,,