Quarter	Billions of US Dollars
1993-07-01	2.28702
1993-10-01	2.19835
1994-01-01	2.53866
1994-04-01	2.19560
1994-07-01	2.11648
1994-10-01	2.13590
1995-01-01	1.95020
1995-04-01	1.46095
1995-07-01	1.72922
1995-10-01	1.64365
1996-01-01	2.21295
1996-04-01	2.71754
1996-07-01	2.22366
1996-10-01	2.37196
1997-01-01	1.21481
1997-04-01	0.91717
1997-07-01	0.77053
1997-10-01	1.29897
1998-01-01	1.15157
1998-04-01	1.14991
1998-07-01	0.95736
1998-10-01	0.99885
1999-01-01	0.37515
1999-04-01	0.69329
1999-07-01	1.15465
1999-10-01	1.05664
2000-01-01	1.25898
2000-04-01	1.02988
2000-07-01	0.78824
2000-10-01	0.79364
2001-01-01	0.41199
2001-04-01	0.59392
2001-07-01	0.73343
2001-10-01	0.66799
2002-01-01	0.63958
2002-04-01	0.40373
2002-07-01	0.35947
2002-10-01	0.33651
2003-01-01	0.51883
2003-04-01	0.66904
2003-07-01	0.60276
2003-10-01	0.93836
2004-01-01	0.51346
2004-04-01	0.76350
2004-07-01	0.83700
2004-10-01	0.99350
2005-01-01	0.60000
2005-04-01	0.47650
2005-07-01	0.27650
2005-10-01	0.46650
2006-01-01	0.30000
2006-04-01	0.30000
2006-07-01	0.30000
2006-10-01	0.02500
2007-01-01	0.14754
2007-04-01	0.52883
2007-07-01	0.55582
2007-10-01	0.55578
2008-01-01	0.40371
2008-07-01	0.10000
2009-01-01	0.10000
2009-04-01	0.10000
2010-01-01	0.15000
2010-04-01	0.15000
2010-07-01	0.15000
2010-10-01	0.15000
2011-01-01	0.05000
2011-04-01	0.37389
2011-07-01	0.38050
2011-10-01	0.50733
2012-01-01	0.44346
2012-04-01	0.12610
2012-07-01	0.12892
2012-10-01	0.88500
2013-01-01	1.82350
2013-07-01	0.00777
2013-10-01	0.00792
2014-01-01	0.00801
2014-04-01	0.00819
2015-04-01	0.50000