Quarter	Billions of US Dollars
1997-04-01	0.35178
2000-10-01	0.25950
2001-01-01	0.14231
2001-04-01	0.51733
2002-04-01	0.34053
2003-07-01	0.81357
2003-10-01	-0.17830
2005-04-01	0.61364
2005-10-01	-0.35652
2008-04-01	0.22929
2010-01-01	1.42908
2010-07-01	-0.90380
2011-04-01	2.15887
2012-01-01	3.25540
2012-04-01	-0.89743
2012-07-01	0.94346
2012-10-01	1.94589
2013-01-01	1.50000
2013-07-01	1.98674
2013-10-01	1.36479
2014-01-01	2.00000
2014-04-01	1.71397
2014-10-01	1.87356
2015-01-01	-1.12602
2015-04-01	-0.55238