30,000 Americans Earn 6% of Total National Income
This chart shows the share of U.S. income earned by the top 1/100th of one percent of the U.S. population (annual data from 1913 to 2007). Looks like we have a little ways to go before returning to the inequality levels of the 1950s and '60s (no need to go back to the '70s, though).
Sources: SimoleonSense, Socimages.