Quarter	Billions of US Dollars
1993-07-01	0.30000
1993-10-01	0.30000
1994-01-01	0.30000
1997-04-01	0.08520
1997-07-01	0.08520
1997-10-01	0.08520
1998-01-01	0.08520
2000-10-01	0.20000
2001-01-01	0.20000
2001-04-01	0.20000
2001-07-01	0.20000
2004-10-01	0.20000
2005-01-01	0.20000
2005-04-01	0.90848
2005-07-01	0.90648
2005-10-01	0.69668
2006-01-01	0.70896
2006-07-01	0.16978
2006-10-01	0.66814
2007-01-01	0.67000
2007-04-01	0.66230
2007-07-01	0.50000
2008-01-01	0.63248
2008-04-01	0.63056
2008-07-01	0.57212
2008-10-01	0.55668
2009-01-01	0.50000
2009-04-01	0.50000
2009-07-01	0.50000
2009-10-01	0.50000
2011-01-01	0.12400
2011-04-01	0.32400
2011-07-01	0.72400
2011-10-01	0.72400
2012-01-01	0.60000
2012-04-01	1.15000
2012-07-01	0.75000
2012-10-01	0.75000
2013-01-01	1.25000
2013-04-01	0.50000
2013-07-01	0.50000
2013-10-01	0.50000
2014-10-01	0.91058
2015-01-01	0.80693
2015-04-01	0.83917