Quarter	Billions of US Dollars
1975-07-01	0.01910
1976-01-01	0.02820
1977-07-01	0.02250
1980-04-01	0.00960
1983-01-01	0.02060
1984-07-01	0.02500
1985-10-01	0.03800
1986-01-01	0.23390
1986-10-01	0.15000
1987-04-01	0.07060
1989-01-01	0.04000
1990-04-01	0.34070
1992-04-01	0.20000
1993-07-01	0.11000
1994-10-01	1.01500
1995-04-01	0.00800
1996-01-01	0.43922
1996-04-01	0.32574
1996-07-01	0.15489
1996-10-01	0.84221
1997-01-01	0.16622
1997-04-01	0.66083
1997-07-01	0.33501
1997-10-01	0.81956
1998-01-01	0.72607
1998-04-01	1.30092
1998-07-01	0.70944
1998-10-01	1.53409
1999-01-01	1.21281
1999-04-01	0.19321
1999-07-01	1.30538
1999-10-01	0.08543
2000-01-01	0.13574
2000-04-01	1.19198
2000-07-01	1.04693
2000-10-01	2.44346
2001-01-01	0.64862
2001-04-01	0.28623
2001-07-01	0.03742
2001-10-01	0.00271
2002-01-01	0.00058
2002-04-01	0.07119
2002-07-01	0.02095
2002-10-01	0.00498
2003-01-01	0.09260
2003-04-01	0.05717
2003-07-01	0.44615
2003-10-01	0.79983
2004-01-01	1.55357
2004-04-01	0.74945
2004-07-01	0.22125
2004-10-01	0.55841
2005-01-01	0.35641
2005-04-01	0.42824
2005-07-01	0.49544
2005-10-01	1.83843
2006-01-01	1.31749
2006-04-01	2.29075
2006-07-01	1.22398
2006-10-01	1.09018
2007-01-01	1.42930
2007-04-01	1.51019
2007-07-01	0.06955
2007-10-01	0.36762
2008-01-01	0.54969
2008-04-01	2.21732
2008-07-01	0.73341
2008-10-01	0.34447
2009-01-01	0.06315
2009-04-01	0.70596
2009-07-01	0.48201
2009-10-01	1.44130
2010-01-01	0.75555
2010-04-01	0.65734
2010-07-01	0.05816
2010-10-01	1.65020
2011-01-01	0.83756
2011-04-01	0.31795
2011-07-01	0.98030
2011-10-01	1.82760
2012-01-01	3.35129
2012-04-01	1.71000
2012-07-01	0.85776
2012-10-01	1.41875
2013-01-01	1.78915
2013-04-01	1.00918
2013-07-01	5.59590
2013-10-01	6.45679
2014-01-01	0.68984
2014-04-01	9.35094
2014-07-01	3.73035
2014-10-01	5.72996
2015-01-01	2.04860
2015-04-01	2.74047