Notes:
Seasonally adjusted data measure the real differences in data trends by adjusting for seasonal factors, such as the change in the number of days, weekends, holidays, or other seasonal activity in a month such as vacation travel. This product uses the FRED API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.
Sources:
Seasonally Adjusted - U.S. Department of Transportation, Bureau of Transportation Statistics, Seasonally Adjusted Transportation Data https://fred.stlouisfed.org/series/WATERBORNED11/.
Not seasonally adjusted - U.S. Department of Transportation, Bureau of Transportation Statistics, Seasonally Adjusted Transportation Data https://fred.stlouisfed.org/series/WATERBORNE/.
Last Updated: June 2023