Quarter	Billions of US Dollars
1997-07-01	0.03000
1997-10-01	0.03000
1998-01-01	0.03000
1998-04-01	0.03000
1998-07-01	0.03000
1998-10-01	0.03000
1999-01-01	0.03000
1999-04-01	0.18492
1999-07-01	0.18997
1999-10-01	0.25604
2000-01-01	0.24494
2000-04-01	0.24501
2000-07-01	0.19721
2000-10-01	0.20936
2001-01-01	0.19872
2001-04-01	0.21200
2001-07-01	0.22828
2001-10-01	0.39658
2002-01-01	0.39258
2002-04-01	0.44887
2002-07-01	0.46342
2002-10-01	0.49289
2003-01-01	0.51207
2003-04-01	0.53707
2003-07-01	0.54764
2003-10-01	0.59361
2004-01-01	0.57453
2004-04-01	0.79007
2004-07-01	0.80658
2004-10-01	0.89218
2005-01-01	0.84914
2005-04-01	0.91295
2005-07-01	0.88509
2005-10-01	0.86708
2006-01-01	0.88964
2006-04-01	1.18867
2006-07-01	1.18371
2006-10-01	1.22481
2007-01-01	1.23857
2007-04-01	1.21545
2007-07-01	1.27611
2007-10-01	1.32489
2008-01-01	2.05556
2008-04-01	1.89168
2008-07-01	1.71636
2008-10-01	1.39170
2009-01-01	1.33080
2009-04-01	1.41340
2009-07-01	1.46430
2009-10-01	1.44060
2010-01-01	1.34790
2010-04-01	1.22710
2010-07-01	1.36480
2010-10-01	1.33620
2011-01-01	1.42070
2011-04-01	1.65624
2011-07-01	1.58024
2011-10-01	1.53512
2012-01-01	2.56848
2012-04-01	2.50720
2012-07-01	2.53440
2012-10-01	3.80552
2013-01-01	3.77440
2013-04-01	3.79640
2013-07-01	3.83040
2013-10-01	3.85328
2014-01-01	6.61064
2014-04-01	7.39372
2014-07-01	6.36664
2014-10-01	6.26544
2015-01-01	5.88805
2015-04-01	6.00502