http://www.bea.gov/national/xls/gdplev.xls Historicals GDP] growth from 1930 to 2015 in constant dollars vs personal income upper income tax rate. Hovering mouse over SVG in browser shows year. The two with the lowest growth are 1932 and 1946. The correlation is .26 and is significantly different from zero at a 98.8% level of confidence using robust standard errors.
Own work
Delphi234