Quarter	Billions of US Dollars
1972-10-01	0.05000
1974-04-01	0.01720
1976-07-01	0.36720
1976-10-01	0.01140
1977-01-01	0.03760
1977-04-01	0.03660
1977-07-01	0.04390
1978-01-01	0.11400
1978-07-01	0.02560
1978-10-01	0.07640
1979-01-01	0.02990
1979-04-01	0.02830
1979-07-01	0.10000
1980-07-01	0.07110
1981-10-01	0.05534
1982-01-01	0.03000
1983-01-01	-0.01719
1984-01-01	-0.02128
1984-07-01	-0.03426
1985-01-01	-0.03071
1985-10-01	-0.05721
1986-01-01	-0.01597
1986-07-01	-0.10000
1986-10-01	-0.08422
1987-04-01	-0.07009
1987-07-01	-0.01250
1988-01-01	-0.10625
1988-07-01	-0.03250
1988-10-01	-0.05000
1989-01-01	-0.05465
1989-07-01	-0.07000
1990-04-01	0.83690
1990-07-01	-0.08263
1991-10-01	-0.11583
1992-01-01	-0.20720
1992-10-01	3.34824
1993-01-01	0.15000
1993-07-01	0.27500
1993-10-01	0.43920
1994-01-01	0.05308
1994-04-01	0.40500
1994-07-01	0.34000
1994-10-01	0.32900
1995-04-01	-0.12568
1995-07-01	0.39800
1995-10-01	0.16177
1996-01-01	0.01500
1996-04-01	0.60638
1996-07-01	0.58684
1996-10-01	1.69500
1997-01-01	0.95413
1997-04-01	0.83776
1997-07-01	1.19740
1997-10-01	-0.28853
1998-01-01	0.81174
1998-04-01	0.76446
1998-07-01	-0.39899
1998-10-01	-0.50273
1999-01-01	1.19704
1999-04-01	0.75352
1999-07-01	0.76588
1999-10-01	0.36089
2000-01-01	1.57358
2000-04-01	-0.31642
2000-07-01	0.17553
2000-10-01	-0.30899
2001-01-01	-0.86227
2001-04-01	0.26601
2001-07-01	-0.19009
2001-10-01	1.21636
2002-01-01	1.64152
2002-04-01	0.83134
2002-07-01	0.44881
2002-10-01	0.93983
2003-01-01	0.88290
2003-04-01	0.80089
2003-07-01	0.49712
2003-10-01	1.38106
2004-01-01	0.38270
2004-04-01	0.14288
2004-07-01	0.95941
2004-10-01	-0.16641
2005-01-01	1.52524
2005-04-01	0.68391
2005-07-01	0.94342
2005-10-01	-1.11714
2006-01-01	2.52107
2006-04-01	-0.52849
2006-07-01	1.40107
2006-10-01	-0.77359
2007-01-01	1.45512
2007-04-01	-0.08791
2007-07-01	-0.41570
2007-10-01	-0.41752
2008-01-01	0.57904
2008-04-01	-1.42616
2008-07-01	0.15442
2008-10-01	-0.27538
2009-01-01	0.57244
2009-04-01	0.83365
2009-07-01	1.24386
2009-10-01	1.72978
2010-01-01	0.99268
2010-04-01	-0.02954
2010-07-01	0.68071
2010-10-01	1.09812
2011-01-01	2.00104
2011-04-01	1.07500
2011-07-01	-0.40000
2011-10-01	-0.94897
2012-01-01	2.48726
2012-04-01	0.34879
2012-07-01	-0.09820
2012-10-01	1.14271
2013-01-01	-0.62250
2013-04-01	1.85000
2013-07-01	-0.59872
2013-10-01	0.50000
2014-01-01	-0.20000
2014-04-01	0.57500
2014-07-01	-0.37160
2015-01-01	2.32900
2015-04-01	-0.03250