Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: Y807RG
A Guide to the National Income and Product Accounts of the United States (NIPA) - (http://www.bea.gov/national/pdf/nipaguid.pdf)
U.S. Bureau of Economic Analysis, Price Index for Imports of services: Government goods and services n.e.c. [Y807RG3A086NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/Y807RG3A086NBEA, October 20, 2018.