Quarter	Billions of US Dollars
1993-07-01	0.21450
1993-10-01	0.42676
1994-01-01	0.40956
1994-04-01	0.37132
1994-07-01	0.57971
1994-10-01	0.40117
1995-01-01	0.41983
1995-04-01	0.55898
1995-07-01	0.22073
1995-10-01	0.26881
1996-01-01	0.34408
1996-04-01	0.18483
1996-07-01	0.28423
1996-10-01	0.19027
1997-01-01	0.11600
1997-04-01	0.10000
1997-10-01	0.00800
1998-01-01	0.00800
1998-04-01	0.01000
1998-07-01	0.01000
1998-10-01	0.17301
1999-01-01	0.16611
1999-04-01	0.34015
1999-07-01	0.36218
1999-10-01	0.17500
2000-01-01	0.94285
2000-04-01	0.76874
2000-07-01	0.33544
2000-10-01	0.32406
2001-01-01	0.15000
2001-04-01	0.15000
2001-07-01	0.35000
2001-10-01	0.93709
2002-01-01	1.15702
2002-04-01	1.15803
2002-07-01	0.80794
2002-10-01	0.22000
2003-04-01	0.35000
2003-07-01	0.54000
2003-10-01	0.54000
2004-01-01	0.54000
2004-04-01	0.19000
2005-04-01	0.02500
2005-07-01	0.12500
2005-10-01	0.12500
2006-01-01	0.22500
2006-04-01	0.20000
2006-07-01	0.26541
2006-10-01	0.26544
2007-01-01	0.20531
2007-04-01	0.23792
2007-07-01	0.07371
2007-10-01	0.41369
2008-01-01	1.77625
2008-04-01	1.73714
2008-07-01	2.29948
2008-10-01	2.62632
2009-01-01	2.90752
2009-04-01	4.04009
2009-07-01	4.04520
2009-10-01	4.31916
2010-01-01	3.01364
2010-04-01	2.04842
2010-07-01	1.49704
2010-10-01	1.96009
2011-01-01	3.40970
2011-04-01	3.75360
2011-07-01	3.76119
2011-10-01	4.30416
2012-01-01	4.61922
2012-04-01	4.67709
2012-07-01	4.53843
2012-10-01	2.49142
2013-01-01	1.41983
2013-04-01	1.15470
2013-07-01	1.78737
2013-10-01	2.78680
2014-01-01	3.37185
2014-04-01	3.41111
2014-07-01	5.31314
2014-10-01	6.25557
2015-01-01	6.61715
2015-04-01	7.78056