Quarter	Billions of US Dollars
1993-07-01	0.10360
1993-10-01	0.52780
1994-01-01	0.13440
1994-04-01	-0.05810
1994-07-01	0.13600
1994-10-01	0.06130
1995-04-01	0.20000
1995-07-01	0.15580
1995-10-01	0.12410
1997-10-01	0.01753
1998-07-01	0.20822
1998-10-01	-0.00121
1999-01-01	-0.05262
1999-07-01	-0.19845
1999-10-01	-0.06878
2000-07-01	-0.08271
2000-10-01	-0.13192
2001-04-01	-0.10643
2001-10-01	3.44031
2002-01-01	-0.10687
2002-04-01	-0.03778
2002-07-01	-0.25527
2002-10-01	-0.00484
2003-04-01	-0.07852
2003-07-01	-0.05573
2003-10-01	0.11062
2004-10-01	0.06251
2005-04-01	-0.04893
2005-07-01	0.17757
2005-10-01	0.25450
2006-04-01	0.25118
2006-07-01	0.04849
2006-10-01	0.14900
2007-10-01	0.44412
2008-07-01	-0.05587
2008-10-01	0.50766
2009-04-01	0.17738
2009-07-01	0.03521
2009-10-01	0.01566
2010-01-01	6.76117
2010-07-01	-0.13584
2011-01-01	-0.06832
2011-04-01	0.28785
2011-07-01	0.08717
2011-10-01	0.07547
2012-04-01	0.13165
2012-07-01	-5.00350
2012-10-01	0.01936
2013-01-01	0.13188
2013-04-01	0.02576
2013-10-01	0.21777
2014-01-01	-0.05000
2014-04-01	0.04116
2014-07-01	-0.18275
2014-10-01	-0.34395
2015-04-01	-0.29177