Quarter	Billions of US Dollars
1993-07-01	0.20500
1993-10-01	-0.03724
1994-01-01	0.22900
1994-04-01	-0.12000
1994-07-01	0.07800
1994-10-01	0.06800
1995-01-01	0.17650
1995-04-01	0.02800
1995-07-01	-0.01737
1995-10-01	-0.00382
1996-01-01	0.10939
1996-04-01	-0.01077
1996-07-01	0.09813
1996-10-01	-0.04062
1997-01-01	0.01103
1997-04-01	-0.06363
1997-07-01	-0.02668
1997-10-01	-0.00923
1998-01-01	-0.04762
1998-04-01	-0.01981
1998-07-01	-0.06900
1998-10-01	0.00505
1999-01-01	0.00046
1999-04-01	-0.00480
1999-07-01	0.08474
1999-10-01	-0.04462
2000-01-01	0.02389
2000-04-01	-0.00066
2000-07-01	0.09152
2000-10-01	0.03300
2001-01-01	0.05500
2001-04-01	0.01000
2001-07-01	0.03000
2001-10-01	0.24048
2002-01-01	-0.17540
2002-04-01	0.13897
2002-07-01	0.26776
2002-10-01	-0.06388
2003-01-01	-0.05612
2003-04-01	-0.04363
2003-07-01	-0.01923
2003-10-01	-0.04905
2004-01-01	0.08500
2004-04-01	-0.05641
2004-07-01	-0.00499
2004-10-01	-0.09890
2005-01-01	-0.06865
2005-04-01	-0.11490
2005-07-01	-0.20900
2005-10-01	-0.18839
2006-04-01	-0.20094
2006-07-01	-0.05032
2006-10-01	1.22450
2007-01-01	-0.19707
2007-04-01	-0.06500
2008-04-01	-0.23428
2008-07-01	0.50293
2008-10-01	-0.44250
2009-07-01	-0.21453
2010-04-01	0.51010
2011-04-01	2.00000
2011-10-01	-1.34767
2012-04-01	0.67949
2014-01-01	-0.20000
2014-07-01	0.99350
2015-04-01	-0.19500