Quarter	Billions of US Dollars
1973-01-01	0.02000
1973-07-01	0.02500
1980-01-01	0.02500
1980-04-01	0.03000
1985-01-01	-0.02500
1985-04-01	-0.03000
1985-10-01	-0.01550
1986-07-01	0.03880
1986-10-01	-0.00225
1987-04-01	0.04925
1987-07-01	-0.00075
1988-01-01	-0.00075
1988-07-01	-0.02500
1991-04-01	0.20000
1992-04-01	-0.05000
1993-04-01	0.12500
1993-07-01	0.15000
1993-10-01	0.11500
1994-01-01	0.34165
1994-04-01	-0.00300
1994-07-01	-0.06822
1994-10-01	0.04650
1995-01-01	0.01561
1995-04-01	0.15666
1995-07-01	0.14770
1995-10-01	0.25019
1996-01-01	0.48479
1996-04-01	0.60574
1996-07-01	0.48536
1996-10-01	0.23931
1997-01-01	1.00000
1997-04-01	0.16500
1997-10-01	0.15000
1998-01-01	0.38769
1998-04-01	0.52500
1998-07-01	0.50000
1998-10-01	-0.05000
1999-01-01	0.41419
1999-04-01	0.67560
1999-10-01	0.40140
2000-01-01	0.75000
2000-04-01	0.14774
2000-07-01	0.26604
2000-10-01	0.14434
2001-01-01	0.78438
2001-04-01	1.54891
2001-07-01	0.10143
2001-10-01	0.87411
2002-01-01	-0.21602
2002-04-01	-0.71919
2002-07-01	0.39928
2002-10-01	0.50000
2003-01-01	0.09901
2003-04-01	-0.56392
2003-07-01	0.39998
2004-01-01	-0.36271
2004-07-01	0.32440
2004-10-01	0.54381
2005-01-01	0.44706
2005-04-01	0.14919
2005-07-01	0.01445
2005-10-01	0.12998
2006-01-01	-0.24488
2006-04-01	-0.60561
2006-07-01	2.11478
2006-10-01	0.36840
2007-01-01	0.05569
2007-04-01	1.13195
2007-07-01	0.30087
2007-10-01	1.31000
2008-01-01	-0.39679
2008-04-01	-0.23877
2009-01-01	1.00000
2009-04-01	0.11531
2009-07-01	2.00000
2009-10-01	1.90300
2010-01-01	-0.84117
2010-04-01	0.59593
2010-07-01	1.38546
2010-10-01	-0.09950
2011-01-01	1.19714
2011-04-01	0.42358
2011-07-01	2.00107
2011-10-01	0.77145
2012-01-01	0.30332
2012-04-01	0.75160
2012-07-01	3.24885
2012-10-01	-0.27092
2013-01-01	1.81601
2013-04-01	0.77000
2013-07-01	4.10264
2013-10-01	1.73863
2014-01-01	1.00436
2014-04-01	3.00000
2014-07-01	2.72987
2014-10-01	-0.14470
2015-01-01	2.49726
2015-04-01	1.53000