Quarter	Billions of US Dollars
1987-01-01	0.0400
1987-04-01	0.0400
1987-07-01	0.0400
1987-10-01	0.0400
1988-01-01	0.0400
1988-04-01	0.0400
1988-07-01	0.0400
1988-10-01	0.0400
1989-01-01	0.0400
1994-07-01	0.1000
1994-10-01	0.1000
1995-01-01	0.1000
1995-04-01	0.1000
1995-07-01	0.1000
1995-10-01	0.1000
1996-01-01	0.1000
1996-04-01	0.1000
1996-07-01	0.1000
1996-10-01	0.1000
1997-01-01	0.2000
1997-04-01	0.4119
1997-07-01	0.4594
1997-10-01	0.4500
1998-01-01	0.4500
1998-04-01	0.4500
1998-07-01	0.4500
1998-10-01	0.4500
1999-01-01	0.4500
1999-04-01	0.4500
1999-07-01	0.4500
1999-10-01	0.4500
2000-01-01	0.3000
2000-04-01	0.4142
2000-07-01	0.4741
2000-10-01	0.4741
2001-01-01	0.4741
2001-04-01	0.4241
2001-07-01	0.4616
2001-10-01	0.4616
2002-01-01	0.7616
2002-04-01	1.1416
2002-07-01	1.5416
2002-10-01	1.6916
2003-01-01	1.6916
2003-04-01	1.7724
2003-07-01	1.7134
2003-10-01	2.0131
2004-01-01	2.2375
2004-04-01	2.8874
2004-07-01	2.7874
2004-10-01	2.7504
2005-01-01	2.7499
2005-04-01	3.1504
2005-07-01	3.2507
2005-10-01	3.2056
2006-01-01	3.2055
2006-04-01	3.4398
2006-07-01	3.6389
2006-10-01	3.8394
2007-01-01	3.8379
2007-04-01	3.6378
2007-07-01	3.2598
2007-10-01	3.2583
2008-01-01	3.1090
2008-04-01	3.1083
2008-07-01	3.5290
2008-10-01	3.2274
2009-01-01	2.8126
2009-04-01	2.3639
2009-07-01	2.0733
2009-10-01	2.0765
2010-01-01	2.0767
2010-04-01	2.0770
2010-07-01	1.9554
2010-10-01	2.0200
2011-01-01	2.0295
2011-04-01	2.8556
2011-07-01	2.8614
2011-10-01	2.8097
2012-01-01	3.5355
2012-04-01	4.7050
2012-07-01	6.5069
2012-10-01	6.4890
2013-01-01	6.8979
2013-04-01	7.0248
2013-07-01	7.2228
2013-10-01	8.5805
2014-01-01	9.2632
2014-04-01	9.9054
2014-07-01	10.8779
2014-10-01	12.1732
2015-01-01	12.2645
2015-04-01	13.2729