Quarter	Billions of US Dollars
2002-04-01	0.50000
2005-07-01	0.25000
2006-01-01	0.35000
2006-10-01	1.76438
2007-01-01	0.39281
2007-04-01	0.30630
2007-07-01	0.10200
2008-04-01	0.25160
2009-04-01	-0.35000
2010-01-01	-0.05000
2011-01-01	-0.35000
2011-04-01	0.40000
2011-07-01	0.75000
2011-10-01	-1.15647
2012-01-01	-0.39007
2012-04-01	0.25000
2013-01-01	0.49958
2013-04-01	1.00000
2013-07-01	0.45087
2013-10-01	0.57000
2014-04-01	0.37805
2014-10-01	-0.06336
2015-04-01	0.01728