Datawrapper line chart on HOLC and FHA funds 1933-48 for On The Line book http://onthline.trincoll.edu by Jack Dougherty and contributors
https://datawrapper.dwcdn.net/PMDj9/2/
C. Lowell Harriss, History and Policies of the Home Owners’ Loan Corporation (New York: National Bureau of Economic Research, 1951), https://www.nber.org/books/harr51-1, Table 4: Loans Closed by HOLC, 1933-1936, p. 30.
Federal Housing Administration, Fifteenth Annual Report of the Federal Housing Administration, 1949, https://www.huduser.gov/portal/publications/Fifteenth-Annual-Report-of-the-Federal-Housing-Administration.html, Table 1: Yearly Volume of Mortgages and Loans Insured by FHA Under All Titles: Face amount of mortgages written and net proceeds of loans insured, 1934-1948, p. 8.
Note that chart compares HOLC mortgages versus all types of FHA-insured loans and mortgages. The majority of FHA is home mortgage insurance, but the total also includes property improvements and rental housing, which can be disaggregated in the source table.
Also, note that the HOLC data above differs from US Federal Home Loan Bank Board, Annual Report: Federal Home Loan Bank Board (Washington, D.C.: Government Printing Office, 1941), https://catalog.hathitrust.org/Record/008441059, Chart XIX: Home Mortgage Lending Activity (including HOLC), p. 40.
Data Visualization for All, http://datavizforall.org