Quarter	Billions of US Dollars
2001-07-01	0.20000
2001-10-01	0.20000
2002-01-01	0.37448
2002-04-01	0.39950
2002-07-01	0.19720
2002-10-01	0.20974
2003-07-01	0.20391
2003-10-01	0.22102
2004-01-01	0.21392
2004-04-01	0.46271
2004-07-01	0.25000
2004-10-01	0.25000
2005-01-01	0.25000
2006-07-01	0.22500
2006-10-01	0.22500
2007-01-01	0.22500
2007-04-01	0.22500
2008-01-01	0.31624
2008-04-01	0.31528
2008-07-01	0.28606
2008-10-01	0.27834
2010-04-01	0.40000
2010-07-01	0.40000
2010-10-01	0.40000
2011-01-01	0.40000
2011-07-01	0.27006
2011-10-01	0.25878
2012-01-01	0.26712
2012-04-01	0.25180
2013-10-01	0.20686
2014-01-01	0.20682
2014-04-01	0.50487
2014-07-01	0.48875
2014-10-01	0.30000
2015-01-01	0.30000