Quarter	Billions of US Dollars
1981-10-01	0.02500
1994-01-01	0.07100
1994-04-01	0.04000
1997-01-01	4.87553
1997-04-01	0.05000
1998-01-01	0.00500
1998-10-01	0.15000
1999-07-01	0.00430
2002-01-01	1.43000
2002-10-01	0.50000
2003-01-01	0.75000
2003-10-01	0.50000
2004-04-01	0.50000
2004-10-01	0.80565
2005-01-01	0.40000
2005-07-01	0.75000
2005-10-01	0.78000
2006-01-01	0.20000
2006-07-01	0.21300
2006-10-01	0.75400
2007-01-01	2.12000
2007-04-01	0.29162
2007-07-01	2.00378
2007-10-01	0.17344
2008-07-01	0.15000
2009-01-01	1.00000
2009-07-01	1.04000
2009-10-01	0.62200
2010-01-01	0.32500
2010-04-01	1.65580
2010-07-01	1.21500
2010-10-01	2.62661
2011-01-01	0.78500
2011-07-01	0.65000
2011-10-01	0.62000
2012-01-01	3.22512
2012-04-01	1.87639
2012-07-01	0.91500
2012-10-01	0.25000
2013-01-01	2.22500
2013-04-01	1.58000
2013-10-01	0.69560
2014-01-01	1.60000
2014-04-01	0.87593
2014-07-01	1.10173
2014-10-01	5.01887
2015-01-01	2.00028
2015-04-01	1.15492