Quarter	Billions of US Dollars
1977-04-01	0.00990
1979-04-01	0.01470
1984-10-01	0.20000
2003-10-01	0.27000
2004-10-01	0.18670
2005-10-01	0.70000
2006-04-01	1.00000
2006-07-01	0.48452
2006-10-01	1.46123
2007-01-01	0.60000
2007-04-01	0.82500
2007-07-01	2.50000
2008-04-01	1.33000
2008-10-01	1.02615
2009-04-01	1.86660
2009-07-01	0.00050
2010-01-01	1.29330
2010-10-01	1.00000
2011-10-01	0.99995
2012-01-01	1.75000
2012-04-01	0.75000
2013-01-01	2.00000
2013-04-01	0.65900
2013-07-01	1.00100
2013-10-01	1.30570
2014-04-01	4.25000
2015-04-01	0.01070