Quarter	Billions of US Dollars
1981-10-01	0.02500
1986-10-01	-0.02500
1994-01-01	0.07100
1994-04-01	0.04000
1995-10-01	-0.00775
1996-01-01	-0.00775
1996-07-01	-0.00775
1997-01-01	4.82778
1997-04-01	0.01000
1998-01-01	0.00500
1998-07-01	-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	0.50000
2004-10-01	0.80565
2005-01-01	0.33333
2005-07-01	0.75000
2005-10-01	0.78000
2006-01-01	0.10000
2006-07-01	0.21300
2006-10-01	0.75400
2007-01-01	1.41713
2007-04-01	0.19205
2007-07-01	1.02465
2007-10-01	0.17664
2008-01-01	-1.43852
2008-04-01	0.00327
2008-07-01	0.15331
2008-10-01	-0.14666
2009-01-01	1.00338
2009-04-01	0.00341
2009-07-01	1.04345
2009-10-01	0.57549
2010-01-01	0.32853
2010-04-01	0.97042
2010-07-01	0.81860
2010-10-01	3.03425
2011-01-01	0.78868
2011-04-01	0.00372
2011-07-01	0.65376
2011-10-01	0.62380
2012-01-01	3.21606
2012-04-01	1.88076
2012-07-01	0.92041
2012-10-01	0.01146
2013-01-01	1.87352
2013-04-01	1.91057
2013-07-01	-0.00938
2013-10-01	0.67628
2014-01-01	1.30573
2014-04-01	0.66181
2014-07-01	1.47748
2014-10-01	4.02443
2015-01-01	1.23261
2015-04-01	0.76094