Quarter	Billions of US Dollars
2003-04-01	0.00689
2003-07-01	0.05520
2004-04-01	0.01000
2004-07-01	-0.01000
2004-10-01	0.25823
2005-01-01	0.25997
2005-07-01	-0.24386
2005-10-01	-0.01000
2006-04-01	0.40099
2006-07-01	-0.05096
2006-10-01	0.09672
2008-01-01	-0.29973
2008-04-01	-0.00937
2008-07-01	0.38695
2009-04-01	-0.10202
2010-07-01	-0.34215
2013-04-01	-0.42461