Source: US. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: A798RX1
A Guide to the National Income and Product Accounts of the United States - http://www.bea.gov/national/pdf/nipaguid.pdf
US. Bureau of Economic Analysis, Real Federal Nondefense Gross Investment [NDGIC96], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/NDGIC96, December 3, 2016.