Quarter	Billions of US Dollars
1997-07-01	0.52544
1998-10-01	0.09359
2002-04-01	0.25758
2003-07-01	0.33450
2004-04-01	0.61474
2004-07-01	-0.62886
2004-10-01	0.00002
2005-01-01	0.00002
2005-04-01	0.39974
2005-07-01	0.00002
2005-10-01	0.00002
2006-01-01	0.00002
2006-04-01	0.00002
2006-07-01	0.00002
2006-10-01	0.00002
2007-01-01	0.00002
2007-04-01	0.14043
2007-07-01	-0.05023
2007-10-01	-0.01806
2008-01-01	-0.01006
2008-04-01	0.15738
2008-07-01	-0.02964
2008-10-01	-0.00678
2009-01-01	-0.07431
2009-04-01	-0.25202
2009-07-01	-0.04858
2009-10-01	-0.01378
2010-01-01	-0.03063
2010-04-01	-0.01295
2010-07-01	-0.03266
2010-10-01	0.01223
2011-01-01	-0.22672
2011-04-01	-0.00078
2011-07-01	-0.04341
2011-10-01	-0.00633
2012-01-01	-0.05018
2012-04-01	0.00002
2012-07-01	-0.00528
2012-10-01	0.25002
2013-01-01	0.00002
2013-04-01	-0.18998
2013-07-01	-0.07400
2013-10-01	-0.01780
2014-01-01	-0.01770
2014-04-01	0.13919
2014-07-01	-0.00863
2014-10-01	-0.00823
2015-01-01	0.67760
2015-04-01	0.00002