Quarter	Billions of US Dollars
1981-10-01	0.02500
1986-10-01	-0.02500
1994-01-01	0.04000
1994-04-01	0.04000
1997-01-01	4.83053
1997-04-01	0.11000
1998-01-01	0.00500
1998-10-01	-0.59012
1999-07-01	-0.00070
1999-10-01	-0.00081
2000-10-01	-0.00349
2002-01-01	0.73957
2002-04-01	-0.06820
2002-10-01	-0.41805
2003-01-01	0.73180
2003-07-01	-0.03641
2003-10-01	-0.41029
2004-04-01	0.40000
2004-10-01	0.80565
2005-01-01	0.33333
2005-07-01	0.75000
2005-10-01	0.72705
2006-07-01	0.21300
2006-10-01	0.97900
2007-01-01	1.41713
2007-04-01	-0.10166
2007-07-01	0.68635
2007-10-01	0.01400
2008-01-01	-1.44176
2008-10-01	-0.15000
2009-01-01	1.35130
2009-04-01	0.02500
2009-07-01	1.07000
2009-10-01	0.70700
2010-01-01	0.56753
2010-04-01	0.96686
2010-07-01	0.93953
2010-10-01	3.60561
2011-01-01	1.12847
2011-04-01	-0.01000
2011-07-01	0.07500
2011-10-01	0.32000
2012-01-01	2.71222
2012-04-01	1.34695
2012-07-01	1.54500
2012-10-01	0.48600
2013-01-01	2.16800
2013-04-01	3.00500
2013-07-01	-0.01500
2013-10-01	0.67060
2014-01-01	1.10000
2014-04-01	1.06303
2014-07-01	1.92164
2014-10-01	4.37885
2015-01-01	0.77930
2015-04-01	0.90492