The data source is DeNavas-Walt, Carmen; Bernadette D. Proctor, Robert J. Mills (08 2004). Table A-3: Selected Measures of Household Income Dispersion: 1967 to 2003(in English) (PDF). Income, Poverty, and Health Insurance Coverage in the United States: 2003 36-37. U.S. Census Bureau. Retrieved on 2007-06-16.
Income, Poverty, and Health Insurance Coverage in the United States: 2003
Carmen DeNavas-Walt, Bernadette D. Proctor, Robert J. Mills
August 2004
U.S. Census Bureau
U.S. Department of Commerce
Table A-3: Selected Measures of Household Income Dispersion: 1967 to 2003
{{Information |Description={{en|US income inequality relative to median, 1967–2003, log chart.}} |Source={{own}} Made in Gnumeric and Inkscape. {{Created with Inkscape}} |Date=2010-03-05 |Author=Nils R. Barth |Permission