The Center on Budget and Policy Priorities charts it internationally:

(OECD data)

Oh, and it gets worse. This data doesn’t include income from capital gains and dividends. “If you include these income sources, the top 1 percent of U.S. income earners received 23.5 percent of the nation’s income in 2007, up 9.2 percentage points from 1990, and the top 0.1 percent received 12.3 percent, up 6.5 percentage points from 1990,” the OECD reports.