Quarter	Billions of US Dollars
1997-07-01	0.03000
2000-07-01	-0.03000
2001-04-01	0.02182
2002-07-01	0.01967
2004-04-01	0.00586
2004-10-01	0.00663
2005-04-01	0.12543
2005-07-01	-0.02439
2006-04-01	0.24676
2006-10-01	-0.00645
2007-04-01	-0.04044
2008-04-01	-0.15619
2011-04-01	-0.28785
2014-07-01	0.40816