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Table 5 - Investment in Transportation Infrastructure as Percentage of GDP by Mode and by Sector, Average for 1977-2000

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  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.