Quarter	Billions of US Dollars
1997-10-01	0.1798
1998-10-01	-0.1883
2000-07-01	0.0100
2001-01-01	-0.0100
2001-04-01	0.0500
2001-07-01	0.4450
2001-10-01	-0.4619
2002-01-01	0.1026
2002-04-01	-0.0368
2002-07-01	0.0006
2002-10-01	0.0094
2003-01-01	0.1771
2003-04-01	0.5873
2003-07-01	0.6134
2003-10-01	0.2380
2004-01-01	1.5247
2004-04-01	-0.7190
2004-07-01	0.7430
2004-10-01	-0.1182
2005-01-01	0.5656
2005-04-01	2.0896
2005-07-01	-1.7702
2005-10-01	-0.3082
2006-01-01	-0.4637
2006-04-01	4.6242
2006-07-01	-2.9904
2006-10-01	0.5878
2007-01-01	0.6772
2007-04-01	8.7898
2007-07-01	-2.5057
2007-10-01	-2.7950
2008-01-01	1.1102
2008-04-01	12.2694
2008-07-01	-3.4360
2008-10-01	-5.0546
2009-01-01	-2.1023
2009-04-01	3.3880
2009-07-01	2.0239
2009-10-01	-14.5054
2010-01-01	0.4774
2010-04-01	0.5612
2010-07-01	-0.5545
2010-10-01	3.3853
2011-01-01	-3.8560
2011-04-01	-2.4556
2011-07-01	-0.1955
2011-10-01	13.9253
2012-01-01	5.1378
2012-04-01	-9.4451
2012-07-01	-4.5942
2012-10-01	-1.6009
2013-01-01	-3.1070
2013-04-01	12.2304
2013-07-01	0.2822
2013-10-01	10.2812
2014-01-01	2.5268
2014-04-01	-6.2681
2014-07-01	-1.6717
2014-10-01	2.2861
2015-01-01	10.8571
2015-04-01	22.3463