Quarter	Billions of US Dollars
1994-04-01	0.04000
1997-04-01	0.01000
2002-04-01	-0.05000
2007-10-01	0.01400
2009-07-01	0.01000
2009-10-01	0.11500
2010-01-01	0.21000
2010-04-01	0.19500
2010-07-01	0.01500
2010-10-01	0.02500
2011-10-01	0.32000
2012-01-01	0.72500
2012-04-01	1.29695
2012-07-01	0.20000
2012-10-01	0.13600
2013-01-01	1.36800
2013-04-01	1.38500
2013-07-01	-0.01500
2013-10-01	0.44060
2014-01-01	0.80000
2014-04-01	0.07500
2014-07-01	0.97108
2014-10-01	0.71400
2015-01-01	0.20584
2015-04-01	-0.25000