6-6 Transportation Services Index: Jan. 2000–Aug. 2016
Notes: The TSI, created by the U.S. Department of Transportation, Bureau of Transportation Statistics, is a measure of the month-to month changes in the output of services provided by the for-hire transportation industries. TSI data change monthly due to the use of concurrent seasonal analysis, which results in seasonal analysis factors changing as each month’s data are added.
Source: U.S. Department of Transportation, Bureau of Transportation Statistics, available at www.bts.gov as of October 2016.