Quarter	Billions of US Dollars
1987-04-01	-0.00900
2002-10-01	0.03023
2004-10-01	0.06640
2007-01-01	0.15531
2007-10-01	0.14159
2009-07-01	2.60466
2009-10-01	-0.11820
2010-04-01	1.25497
2010-10-01	0.06979
2011-01-01	0.48604
2012-07-01	-2.50175
2013-01-01	0.26151
2013-07-01	-0.11681
2014-04-01	0.13271
2014-07-01	0.40852
2014-10-01	-0.06245
2015-04-01	-1.43620