Quarter	Billions of US Dollars
1994-01-01	0.01500
1995-01-01	-0.01500
1997-01-01	0.10000
1997-07-01	0.30000
2003-10-01	-0.22197
2006-04-01	0.20000
2007-01-01	-0.10000
2007-07-01	-0.07803
2009-07-01	0.10000
2010-10-01	0.50000
2012-01-01	0.50000
2012-07-01	0.65157
2012-10-01	0.75487
2013-01-01	1.80000
2013-04-01	0.79819
2013-07-01	0.59066
2013-10-01	0.58287
2014-01-01	0.32890
2014-04-01	0.29407
2014-07-01	0.69888
2014-10-01	0.29725
2015-01-01	0.26455
2015-04-01	0.16078