The effective federal tax rate of the richest 1 percent of Americans has plummeted even while their incomes have skyrocketed, as the chart below shows. Households in the top 1 percent more than doubled their incomes from an average of more than $800,000 in 1993 to nearly $1.9 million in 2007. During that same period, their effective federal tax rate dropped from 35 percent to 30 percent.
SOURCE: The Richest 1 Percent Get More, Pay Less.