Quarter	Billions of US Dollars
1998-04-01	0.00019
1998-07-01	0.00007
1998-10-01	0.03876
1999-01-01	0.03310
2002-07-01	0.00595
2002-10-01	0.00581
2003-01-01	0.00588
2003-04-01	0.00608
2003-07-01	0.00603
2003-10-01	0.00627
2004-01-01	0.05387
2004-04-01	0.02584
2005-01-01	0.03594
2005-04-01	0.03488
2005-07-01	0.03509
2006-01-01	0.06844
2006-04-01	0.19011
2006-07-01	0.21455
2006-10-01	0.28300
2007-01-01	0.09635
2007-04-01	0.08263
2007-07-01	0.09283
2007-10-01	1.35025
2008-01-01	1.39717
2008-04-01	1.42351
2008-07-01	1.36492
2008-10-01	1.21069
2009-01-01	1.01554
2009-04-01	1.17657
2009-07-01	1.18396
2009-10-01	1.14400
2010-01-01	1.02737
2010-04-01	0.96601
2010-07-01	0.99384
2010-10-01	0.99277
2011-01-01	1.08958
2011-04-01	1.11139
2011-07-01	1.00534
2011-10-01	1.01047
2012-01-01	1.07122
2012-04-01	3.13990
2012-07-01	3.61094
2012-10-01	2.79512
2013-01-01	0.40040
2013-04-01	0.39019
2013-07-01	0.36835
2013-10-01	0.25105
2014-01-01	0.24914
2014-04-01	0.31775
2014-07-01	0.26143
2014-10-01	0.23162
2015-01-01	0.22547
2015-04-01	0.13193