Quarter	Billions of US Dollars
1998-01-01	0.01279
1999-01-01	-0.00877
2005-01-01	2.45017
2005-04-01	1.17433
2005-07-01	0.42208
2005-10-01	1.66905
2006-01-01	1.59872
2006-04-01	0.67662
2006-07-01	0.66599
2006-10-01	1.10610
2007-01-01	2.42348
2007-04-01	1.28937
2007-07-01	0.26531
2007-10-01	0.66008
2008-01-01	0.32448
2008-04-01	1.60168
2008-07-01	0.22355
2008-10-01	-0.02516
2009-01-01	0.22167
2009-04-01	0.07329
2009-07-01	0.84199
2009-10-01	0.16444
2010-01-01	0.45573
2010-04-01	0.86440
2010-07-01	-0.15839
2010-10-01	2.67457
2011-01-01	-0.05754
2011-04-01	1.66863
2011-07-01	1.46500
2011-10-01	1.33515
2012-01-01	2.41149
2012-04-01	2.76770
2012-07-01	2.67761
2012-10-01	1.78026
2013-01-01	2.71590
2013-04-01	1.38547
2013-07-01	0.11876
2013-10-01	0.51623
2014-01-01	0.14817
2014-04-01	2.27220
2014-07-01	1.09302
2014-10-01	0.72748
2015-01-01	-1.11982
2015-04-01	0.87462