For A Revised Series, See The Federal Reserve Bulletin Of November 1939. Source: Data For 1919-1928: W.W. Riefles, Money Rates And Money Markets In The United States, 1930, Pp. 232-236. Data For 1928-1939: Photostat Direct From The Federal Reserve Board.
Release: NBER Macrohistory Database
National Bureau of Economic Research, Total Rates Charged Customers and Open Market Rates, Combined for United States [M13032USM156NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M13032USM156NNBR/, October 6, 2015.