Quarter	Billions of US Dollars
1987-01-01	0.12500
1988-04-01	0.10000
1991-10-01	0.00600
1992-01-01	0.13700
1992-04-01	0.20600
1992-07-01	0.26000
1992-10-01	0.29700
1993-01-01	0.32300
1993-04-01	0.74100
1993-07-01	1.08750
1993-10-01	1.23000
1994-01-01	1.71326
1994-04-01	1.80151
1994-07-01	2.05883
1994-10-01	2.22072
1995-01-01	1.17633
1995-04-01	1.21633
1995-07-01	1.48422
1995-10-01	2.02313
1996-01-01	2.00968
1996-04-01	1.72251
1996-07-01	1.22925
1996-10-01	1.10112
1997-01-01	1.10341
1997-04-01	0.94101
1997-07-01	0.94826
1997-10-01	0.96347
1998-01-01	0.88864
1998-04-01	0.88567
1998-07-01	0.61400
1998-10-01	0.46848
1999-01-01	0.41831
1999-04-01	0.64038
1999-07-01	0.53047
1999-10-01	0.82781
2000-01-01	0.90620
2000-04-01	0.42572
2000-07-01	0.62826
2000-10-01	0.54298
2001-01-01	0.57424
2001-04-01	0.42491
2001-07-01	0.13445
2001-10-01	0.06500
2002-01-01	0.05850
2002-04-01	0.06850
2002-07-01	0.06850
2002-10-01	0.05000
2003-01-01	0.05000
2003-04-01	0.05000
2003-07-01	0.05000
2003-10-01	0.05000
2004-01-01	0.05000
2004-04-01	0.05000
2004-07-01	0.05000
2004-10-01	0.08500
2005-01-01	0.08500
2005-04-01	0.11100
2005-07-01	0.11089
2005-10-01	0.07536
2006-01-01	0.07602
2006-04-01	0.05000
2006-07-01	0.05000
2006-10-01	0.05000
2007-01-01	0.05000
2007-04-01	0.05000
2007-07-01	0.05000
2007-10-01	0.05000
2008-01-01	0.05000
2008-04-01	0.11500
2008-07-01	0.11500
2008-10-01	0.11500
2009-01-01	0.11500
2009-04-01	0.05000
2009-07-01	0.05000
2009-10-01	0.05000
2010-01-01	0.05000
2010-04-01	0.05000
2010-07-01	0.05000
2010-10-01	0.05000
2011-01-01	0.05000
2011-04-01	0.05000
2011-07-01	0.05000
2011-10-01	0.13500
2012-01-01	0.13500
2012-04-01	0.13500
2012-07-01	0.13500
2012-10-01	0.05000
2013-01-01	0.05000
2013-04-01	0.05000
2013-07-01	0.05000
2013-10-01	0.05000
2014-01-01	0.05000
2014-04-01	0.05000
2014-07-01	0.05000
2014-10-01	0.05000
2015-01-01	0.05000
2015-04-01	0.05000