The Treasury today released the data for the fiscal year 2013 budget deficit, which amounted to $680 billion, or 4.1 percent of GDP, down about $400 billion from last year's deficit, which was 6.8 percent of GDP. The 2.7 percentage point drop came from 1.5 ppts higher tax receipts and 1.2 ppts lower outlays (both relative to GDP). That's the largest one year decline in the budget deficit since 1969. The deficit is down 6 percentage points of GDP since 2009 -- the largest four-year decline since 1950. We're engaged in a level of budget austerity that would make a European policy maker proud.