"Steuerwirkung" . . "Steuergerechtigkeit" . . "1979-1997" . . "Steuerbelastung" . . "USA" . . . . . . . . . . . . "Effective federal tax rates, 1979-1997" . . . . . "Effective federal tax rates, 1979-1997"@en . "Effective federal tax rates 1979-1997 change in tax rates, 1979 to 1997 (using 2000 tax law for 1997)"@en . "Effective federal tax rates 1979-1997 : change in tax rates, 1979 to 1997 (using 2000 tax law for 1997)"@en . . . . . . . . "Statistics"@en . . . . . . . "United States Congress Budget Office" . .