Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: C021RA
For more information about this series, please see http://www.bea.gov/national/."
U.S. Bureau of Economic Analysis, Imports of goods and services, command basis (chain-type quantity index) [C021RA3A086NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/C021RA3A086NBEA, May 20, 2018.