Quarter	Billions of US Dollars
1992-01-01	2.05096
2002-04-01	0.00000
2002-10-01	-0.60140
2006-10-01	-1.44956
2007-01-01	0.52500
2010-01-01	0.08810
2011-01-01	0.50000
2011-04-01	1.00000
2012-01-01	-0.52500
2012-07-01	0.10158
2013-01-01	0.47329
2013-04-01	0.30000
2013-07-01	1.30000
2013-10-01	0.95116
2014-04-01	1.41855
2014-07-01	1.14760
2014-10-01	0.29950
2015-01-01	-0.07452
2015-04-01	1.30590