Quarter	Billions of US Dollars
2001-07-01	0.15000
2006-07-01	-0.15000
2006-10-01	0.30000
2007-04-01	0.12000
2007-07-01	0.06000
2010-04-01	0.50000
2012-01-01	-0.42000
2012-07-01	0.74000
2012-10-01	1.36000
2013-04-01	0.10000
2013-10-01	0.20000
2014-04-01	1.04558
2014-07-01	0.00876
2014-10-01	2.09470
2015-04-01	-0.50000