Quarter	Billions of US Dollars
1994-07-01	0.51988
1997-07-01	0.20000
1998-07-01	0.01250
2001-07-01	0.50000
2002-10-01	0.02500
2003-01-01	0.60000
2005-10-01	0.16000
2006-01-01	0.30000
2006-10-01	0.25000
2007-01-01	0.43057
2010-04-01	0.75000
2010-10-01	0.28400
2011-01-01	0.04000
2011-07-01	0.50000
2011-10-01	0.25000
2012-10-01	0.55000
2013-01-01	0.30000
2013-04-01	1.00005
2013-10-01	0.50000
2014-04-01	1.25000
2014-07-01	0.25000
2015-01-01	2.50000
2015-04-01	1.00000