"Table 5 
Investment in Transportation Infrastructure as Percentage of GDP by Mode and by Sector, Average for 1977-2000
",,,,,,,,,,,,,,,,,,,,,,,
,Highway,Air,Water,Transit,Railroad,Pipelines,,,,,,,,,,,,,,,,,
Government,0.5743,0.0735,0.0247,0.0898,(NA),(NA),,,,,,,,,,,,,,,,,
Private Business,0.0190,0.0171,0.0048,0.0056,0.0675,0.0137,,,,,,,,,,,,,,,,,
Total,0.5933,0.0906,0.0295,0.0954,0.0675,0.0137,,,,,,,,,,,,,,,,,
Key: (NA) = Data not available,,,,,,,,,,,,,,,,,,,,,,,
"Sources: 
BTS calculations based on data from U.S. Department of Commerce, Bureau of Economic Analysis (BEA), ""Fixed Assets and Consumer Durables,"" available at http://www.bea.gov, as of July 2002; and personal communication with BEA.",,,,,,,,,,,,,,,,,,,,,,,