Source: U.S. Bureau of Economic Analysis
Release: Gross Domestic Product
BEA Account Code: B1222C
For more information about this series, please see http://www.bea.gov/national/."
U.S. Bureau of Economic Analysis, Nonfarm sole proprietorships and partnerships: Depreciation of mining exploration, shafts, and wells charged to current expense, IRS [B1222C1A027NBEA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/B1222C1A027NBEA, March 21, 2018.