Quarter	Billions of US Dollars
1990-07-01	0.15004
1990-10-01	0.22210
1992-04-01	0.01550
1993-04-01	0.30000
1993-07-01	0.32410
1994-01-01	0.00003
1994-04-01	0.25000
1995-01-01	0.07290
1995-04-01	-0.01791
1995-07-01	-0.17455
1995-10-01	-0.24581
1996-04-01	-0.30000
1996-07-01	0.04597
1996-10-01	0.04879
1997-01-01	-3.53423
1997-04-01	0.25000
1998-01-01	-0.05775
1998-10-01	0.20000
1999-04-01	-0.04087
2000-07-01	-0.32536
2001-07-01	0.02155
2001-10-01	0.87949
2002-04-01	0.17806
2003-01-01	0.18244
2003-10-01	0.15000
2004-04-01	2.01588
2004-07-01	0.12445
2004-10-01	0.40282
2005-01-01	1.31481
2005-07-01	-0.39628
2005-10-01	-0.20000
2006-07-01	0.27489
2006-10-01	-0.65623
2007-01-01	0.28060
2007-04-01	0.22918
2007-07-01	0.06871
2007-10-01	0.86960
2008-01-01	0.14986
2008-04-01	3.20179
2008-07-01	1.20393
2008-10-01	-0.15572
2009-01-01	0.19527
2009-04-01	2.41493
2009-07-01	0.15667
2009-10-01	2.68960
2010-01-01	0.20903
2010-04-01	2.52068
2010-07-01	3.03444
2010-10-01	0.69005
2011-01-01	0.14935
2011-04-01	1.34798
2011-07-01	0.02993
2011-10-01	-0.06725
2012-01-01	2.75268
2012-04-01	1.57105
2012-07-01	0.53996
2012-10-01	3.91706
2013-01-01	-0.20994
2013-04-01	1.65189
2013-07-01	0.28830
2013-10-01	0.54446
2014-01-01	1.11210
2014-04-01	-3.02646
2014-07-01	0.22537
2014-10-01	-1.09480
2015-01-01	0.47080
2015-04-01	-0.77658