Quarter	Billions of US Dollars
1997-01-01	0.00373
1997-04-01	0.00390
1997-07-01	0.00408
1997-10-01	0.10426
1998-01-01	0.10000
1998-04-01	0.10000
1998-07-01	0.21000
1998-10-01	0.21000
1999-01-01	0.21000
1999-04-01	0.26000
1999-07-01	0.15000
1999-10-01	0.05000
2000-01-01	0.05000
2000-10-01	0.13000
2001-01-01	0.13000
2001-04-01	0.46500
2001-07-01	0.59000
2001-10-01	0.61000
2002-01-01	0.61000
2002-04-01	0.39000
2002-07-01	0.26500
2002-10-01	0.19000
2003-01-01	0.21015
2003-04-01	0.17015
2003-07-01	0.32015
2003-10-01	0.24515
2004-01-01	0.27500
2004-04-01	0.20000
2004-07-01	0.19000
2004-10-01	0.24485
2005-01-01	0.19485
2005-04-01	0.26369
2005-07-01	0.18369
2005-10-01	0.22884
2006-01-01	0.27884
2006-04-01	0.21000
2006-07-01	0.30000
2006-10-01	0.26000
2007-01-01	0.21000
2007-04-01	0.21000
2007-07-01	0.12000
2007-10-01	0.06000
2008-01-01	0.06000
2008-04-01	0.06000
2009-04-01	0.10000
2009-07-01	0.27000
2009-10-01	0.27000
2010-01-01	0.27000
2010-04-01	0.17000
2011-04-01	0.03116
2011-07-01	0.03116
2011-10-01	0.33116
2012-01-01	0.33116
2012-04-01	0.30000
2012-07-01	0.30000
2014-04-01	2.00000
2014-07-01	2.00000
2014-10-01	2.00000
2015-01-01	2.00000