Statistics of Income
An annual statistical report of economic data compiled from the income returns for individuals and business entities, produced since 1916 by the Internal Revenue Service of the U.S. Department of Treasury. In 1934, the report split into two parts: Part 1 presents data from individuals; Part 2 presents data from businesses. Beginning in the 1950s, these reports were replaced with annual and special reports, usually focused on single taxpayer groups.
United States. Office of Commissioner of Internal Revenue, ([year]), Statistics of Income, [issue title/date], accessed Jul 26, 2014 from FRASER, http:fraser.stlouisfed.org/publication/?pid=61
1916 to 1937