Quarter	Billions of US Dollars
1993-07-01	0.060
1993-10-01	0.060
1994-01-01	0.060
1994-04-01	0.060
1994-07-01	0.060
1994-10-01	0.060
1995-01-01	0.060
1995-04-01	0.060
1995-07-01	0.060
1995-10-01	0.060
1996-01-01	0.060
1996-04-01	0.060
1996-07-01	0.048
1996-10-01	0.048
1997-01-01	0.036
1997-04-01	0.036
1997-07-01	0.186
1997-10-01	0.174
1998-01-01	0.162
1998-04-01	0.162
1998-07-01	0.150
1998-10-01	0.150
1999-01-01	0.150
1999-04-01	0.150
1999-07-01	0.150
1999-10-01	0.150
2000-01-01	0.150
2000-04-01	0.150
2000-07-01	0.150
2000-10-01	0.150
2001-01-01	0.150
2001-04-01	0.150
2001-07-01	0.150
2001-10-01	0.475
2002-01-01	0.475
2002-04-01	0.475
2002-07-01	0.475
2002-10-01	0.475
2003-01-01	0.475
2003-04-01	0.475
2003-07-01	0.775
2003-10-01	0.775
2004-01-01	0.775
2004-04-01	0.775
2004-07-01	0.775
2004-10-01	1.205
2005-01-01	1.205
2005-04-01	1.205
2005-07-01	1.205
2005-10-01	1.205
2006-01-01	1.205
2006-04-01	1.205
2006-07-01	1.205
2006-10-01	1.205
2007-01-01	1.205
2007-04-01	1.205
2007-07-01	1.055
2007-10-01	1.055
2008-01-01	1.055
2008-04-01	1.090
2008-07-01	1.090
2008-10-01	1.090
2009-01-01	1.090
2009-04-01	1.090
2009-07-01	1.090
2009-10-01	1.090
2010-01-01	1.090
2010-04-01	1.090
2010-07-01	1.090
2010-10-01	1.090
2011-01-01	1.090
2011-04-01	1.090
2011-07-01	1.240
2011-10-01	0.915
2012-01-01	1.115
2012-04-01	1.815
2012-07-01	1.815
2012-10-01	2.315
2013-01-01	3.015
2013-04-01	3.115
2013-07-01	2.815
2013-10-01	2.815
2014-01-01	3.615
2014-04-01	3.615
2014-07-01	3.615
2014-10-01	3.515
2015-01-01	3.515
2015-04-01	3.515