U.S. corporate taxes at 40-year low

From the Washington Post's Wonkblog:

Corporate taxes as a share of profits are the lowest in decades, reports Damian Paletta: "U.S. companies are booking higher profits than ever. But the number crunchers in Washington are puzzling over a phenomenon that has just come into view: Corporate tax receipts as a share of profits are at their lowest level in at least 40 years. Total corporate federal taxes paid fell to 12.1% of profits earned from activities within the U.S. in fiscal 2011, which ended Sept. 30, according to the Congressional Budget Office. That's the lowest level since at least 1972. And well below the 25.6% companies paid on average from 1987 to 2008. Corporate income-tax receipts typically fall during recessions, and they declined sharply after the 2008 financial crisis, which wiped out big swaths of profits across the huge financial sector. But U.S. profits have rebounded sharply in recent quarters, while tax receipts have stayed low."

And note, they are not paying 12% of their income, but 12% of their profits.