" the top 10 percent of tax units in 2011 commanded 47 percent of all income, with an average income of $255,000. (A tax unit is not identical to a family, nor is income for tax purposes the same as other measures of income, but the overlaps are big enough that these trends are not misleading.) "

― Angus Deaton , The Great Escape: Health, Wealth, and the Origins of Inequality