Quarter	Billions of US Dollars
1982-10-01	0.012
1997-01-01	0.050
1998-10-01	0.065
2002-07-01	0.350
2004-10-01	0.100
2007-10-01	0.500
2009-10-01	0.500
2010-07-01	1.000
2011-07-01	1.000
2012-04-01	0.500
2012-07-01	1.000
2013-04-01	0.500
2013-07-01	0.750
2013-10-01	0.100
2014-01-01	1.000
2014-04-01	0.675
2014-07-01	0.250
2015-04-01	0.650