Sources:
Piketty and Saez, The World Top Incomes Database; retrieved from: http://184.168.89.58/sketch/
Congressional Budget Office, Historical Effective Rates, Historical Effective Tax Rates, 1979 to 2005; December 2008; retrieved from: http://www.cbo.gov/ftpdocs/88xx/doc8885/Appendix_wtoc.pdf
