We know as a matter of principle that these concerns are misplaced: if there were a shortage of savings, the economy wouldn’t be depressed. Indeed, one way to think about our current problem is that the world as a whole wants to save more than it’s willing to invest.
But it’s always nice to have some real-world data illustrating a principle. From Brad Setser, private and public borrowing in America, as a percentage of GDP:
via Where’s the money coming from? – Paul Krugman Blog – NYTimes.com.