Quarter	Billions of US Dollars
1973-04-01	0.04300
1978-04-01	0.02500
1980-04-01	0.03000
1982-04-01	0.04000
1983-04-01	-0.02500
1984-10-01	-0.04300
1985-04-01	-0.03000
1985-10-01	-0.00800
1987-04-01	-0.03200
2001-07-01	1.50000
2005-07-01	1.25000
2006-07-01	-0.50000
2007-01-01	0.75000
2007-07-01	1.05514
2008-04-01	0.06670
2009-10-01	0.30000
2010-04-01	1.50000
2011-04-01	-0.75000
2011-07-01	-1.00000
2012-07-01	-0.98943
2012-10-01	-0.05894
2013-04-01	2.70000
2013-07-01	1.00000
2014-10-01	-3.00000
2015-04-01	1.63660