The Adjusted Monetary Base is the sum of currency (including coin) in circulation outside Federal Reserve Banks and the U.S. Treasury, plus deposits held by depository institutions at Federal Reserve Banks. These data are adjusted for the effects of changes in statutory reserve requirements on the quantity of base money held by depositories. They are updated monthly by the Federal Reserve Bank of St. Louis.

See even more long-term Adjusted Monetary Base charts and historical data from FRED (Federal Reserve Economic Data), the St. Louis Fed Research Department's database of more than 20,000 U.S. economic time series.