Units: Billions of Dollars, Not Seasonally Adjusted Frequency: Monthly Notes: Data prior to 1991 are from various issues of Banking and Monetary Statistics and the Annual Statistical Digest. Data from 1991 forward are calculated using data from the H.4.1 Release - Factors Affecting Reserve Balances. As of March 1, 2019, this series is calculated as a monthly average of fred.stlouisfed.org/series/WCURCIR. Suggested Citation: Board of Governors of the Federal Reserve System (US), Currency in Circulation [CURRCIR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CURRCIR, May 3, 2021. RELEASE TABLES