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4-3 Transportation Services Index (TSI): January 1990–August 2012 (seasonally adjusted)


 January 1990–August 2012 (seasonally adjusted)

Note: The TSI total is a monthly measure of the volume of services provided by for-hire transportation industries in the United States using 2000 as the base year.

Source: U.S. Department of Transportation, Research and Innovative Tech­nology Administration, Bureau of Transportation Statistics (BTS) available at accessed August 2012.