According to this USA Today article, "Federal, state and local taxes — including income, property, sales and other taxes — consumed 9.2% of all personal income in 2009, the lowest rate since 1950, the Bureau of Economic Analysis reports. That rate is far below the historic average of 12% for the last half-century. The overall tax burden hit bottom in December at 8.8.% of income before rising slightly in the first three months of 2010."
Could help explain some of our national debt. We know for sure that Greece doesn't collect enough taxes. Perhaps the US should take a lesson.