Quarter	Billions of US Dollars
1991-04-01	0.01400
1991-07-01	-0.01500
1994-04-01	-0.00767
1994-10-01	0.07609
1995-01-01	-0.02215
1995-04-01	-0.04483
1995-07-01	-0.03105
1995-10-01	0.01197
1996-01-01	-0.02422
1996-04-01	-0.00945
1996-07-01	-0.01785
1996-10-01	0.00222
1997-01-01	0.02846
1997-04-01	-0.02253
1997-07-01	0.00308
1997-10-01	0.04092
1998-01-01	-0.03292
1998-04-01	0.07305
1998-07-01	0.00161
1998-10-01	0.05135
1999-01-01	-0.05534
1999-04-01	-0.04230
1999-07-01	-0.02325
1999-10-01	-0.00260
2000-04-01	0.04134
2000-07-01	-0.01564
2000-10-01	0.11440
2001-01-01	0.00559
2001-04-01	-0.02351
2001-10-01	-0.04587
2002-01-01	0.00469
2002-10-01	-0.10535
2003-01-01	0.01011
2003-04-01	0.00992
2003-10-01	-0.01037
2004-01-01	-0.01175
2004-04-01	0.01780
2004-07-01	-0.01315
2005-01-01	0.05686
2005-04-01	0.00099
2005-10-01	-0.05712
2006-04-01	0.00454
2006-07-01	0.01716
2006-10-01	-0.00467
2007-07-01	0.07056
2007-10-01	0.00172
2008-01-01	0.01673
2008-04-01	0.98538
2008-07-01	0.52871
2008-10-01	0.03083
2009-01-01	-0.49258
2009-04-01	-0.30695
2009-07-01	-0.34102
2009-10-01	-0.18575
2010-01-01	0.02844
2010-04-01	-0.01435
2010-07-01	0.02979
2010-10-01	0.39706
2011-01-01	-0.56078
2011-04-01	0.09271
2011-07-01	0.19545
2011-10-01	0.19653
2012-01-01	-0.00897
2012-04-01	2.10592
2012-07-01	-0.56832
2012-10-01	0.22468
2013-01-01	-1.91040
2013-04-01	-0.10616
2013-07-01	0.04327
2013-10-01	0.21283
2014-01-01	-0.32739
2014-04-01	-0.02430
2014-07-01	0.02269
2014-10-01	0.01519
2015-01-01	-0.03584
2015-04-01	-0.00218