Quarter	Billions of US Dollars
1972-04-01	0.03150
1972-10-01	0.02000
1973-10-01	0.03000
1975-04-01	0.01200
1975-10-01	0.01920
1976-04-01	0.02500
1976-07-01	0.06000
1976-10-01	0.07090
1977-01-01	0.06190
1977-07-01	0.03040
1977-10-01	0.06220
1978-01-01	0.02500
1979-01-01	0.02500
1981-01-01	0.07500
1982-04-01	0.05000
1982-07-01	0.07500
1983-10-01	0.07000
1985-01-01	0.00390
1985-10-01	0.07500
1986-07-01	0.13000
1986-10-01	0.10000
1987-01-01	0.12500
1987-07-01	0.07500
1990-01-01	0.07500
1991-01-01	0.03510
1991-04-01	0.02000
1991-07-01	0.11000
1992-01-01	0.08900
1993-10-01	0.22500
1994-01-01	0.20000
1994-04-01	0.09670
1994-07-01	0.05000
1994-10-01	0.05000
1995-04-01	0.03000
1995-07-01	0.04000
1995-10-01	0.02971
1996-01-01	0.01500
1996-04-01	0.45971
1996-07-01	0.96750
1996-10-01	0.54322
1997-01-01	1.41112
1997-04-01	0.30357
1997-07-01	0.85504
1998-01-01	1.00000
1998-04-01	1.39291
1998-10-01	0.04389
1999-01-01	0.98937
1999-04-01	0.72126
1999-07-01	0.77577
1999-10-01	1.21371
2000-01-01	0.45560
2000-04-01	3.19755
2000-07-01	0.79740
2000-10-01	0.69057
2001-01-01	1.76603
2001-04-01	2.80039
2001-07-01	0.55283
2001-10-01	4.02202
2002-01-01	0.57479
2002-04-01	0.22920
2002-07-01	0.50372
2002-10-01	0.22131
2003-01-01	0.30143
2003-04-01	1.84454
2003-07-01	1.72785
2003-10-01	3.45295
2004-01-01	2.26864
2004-04-01	2.18889
2004-07-01	2.61852
2004-10-01	2.81129
2005-01-01	1.33298
2005-04-01	0.42931
2005-07-01	2.89831
2005-10-01	1.87941
2006-01-01	0.42567
2006-04-01	3.44279
2006-07-01	1.68393
2006-10-01	0.74760
2007-01-01	1.75454
2007-04-01	4.04751
2007-07-01	1.04837
2007-10-01	1.44597
2008-01-01	1.51821
2008-04-01	2.98034
2008-07-01	1.55388
2008-10-01	0.05526
2009-01-01	0.01844
2009-04-01	0.45749
2009-07-01	2.44550
2009-10-01	3.27752
2010-01-01	1.39329
2010-04-01	0.92029
2010-07-01	4.88562
2010-10-01	1.46359
2011-01-01	2.68490
2011-04-01	2.86662
2011-07-01	0.23814
2011-10-01	3.51608
2012-01-01	6.72598
2012-04-01	2.40125
2012-07-01	9.19601
2012-10-01	5.43831
2013-01-01	4.05146
2013-04-01	3.18832
2013-07-01	4.23110
2013-10-01	2.93572
2014-01-01	3.19465
2014-04-01	4.58410
2014-07-01	5.30161
2014-10-01	1.28948
2015-01-01	2.55993
2015-04-01	4.14162