Quarter	Billions of US Dollars
1987-01-01	-0.06649
1987-04-01	-0.01000
1987-07-01	-0.02839
1988-01-01	-0.12500
1989-01-01	-0.07911
1989-07-01	-0.00036
1990-01-01	-0.02372
1990-04-01	0.11564
1990-07-01	0.10000
1990-10-01	-0.10000
1991-01-01	-0.06500
1991-04-01	0.12500
1991-10-01	0.24000
1992-01-01	0.12550
1992-04-01	0.02909
1992-07-01	0.10000
1992-10-01	0.40980
1993-04-01	0.13485
1993-07-01	0.39774
1993-10-01	0.70730
1994-01-01	0.32057
1994-04-01	0.90081
1994-07-01	0.76512
1994-10-01	0.21335
1995-01-01	-0.64927
1995-04-01	0.19499
1995-07-01	0.49417
1995-10-01	-0.31368
1996-01-01	0.10169
1996-04-01	0.31003
1996-07-01	-0.19923
1996-10-01	-0.36560
1997-01-01	-0.15547
1997-04-01	0.32630
1997-07-01	0.16661
1997-10-01	0.00758
1998-01-01	-0.21258
1998-04-01	-0.86020
1998-07-01	-0.23699
1998-10-01	1.23436
1999-01-01	1.01466
1999-04-01	-0.05531
1999-07-01	1.33161
1999-10-01	0.12381
2000-01-01	0.83578
2000-04-01	-0.27259
2000-07-01	0.54564
2000-10-01	-0.42007
2001-01-01	0.82707
2001-04-01	-0.17908
2001-07-01	0.36287
2001-10-01	-0.19647
2002-01-01	1.66009
2002-04-01	-0.34485
2002-07-01	-0.15218
2002-10-01	0.86654
2003-01-01	1.11097
2003-04-01	1.58751
2003-07-01	0.86235
2003-10-01	-1.03071
2004-01-01	0.87868
2004-04-01	1.47662
2004-07-01	2.54620
2004-10-01	-0.08932
2005-01-01	0.81430
2005-04-01	-0.71288
2005-07-01	0.04259
2005-10-01	0.74532
2006-01-01	-0.01198
2006-04-01	0.10000
2006-07-01	0.15000
2006-10-01	0.99065
2007-01-01	1.97248
2007-04-01	0.64875
2007-07-01	-2.28317
2007-10-01	1.53224
2008-01-01	-1.00000
2008-04-01	2.03462
2008-07-01	-0.00010
2008-10-01	-1.32654
2009-01-01	-1.00961
2009-04-01	-0.00468
2009-07-01	-0.59900
2009-10-01	1.45911
2010-01-01	0.54010
2010-04-01	-3.29610
2010-07-01	0.04666
2010-10-01	-2.48946
2011-01-01	-0.09447
2011-04-01	-0.00467
2011-07-01	-0.01052
2011-10-01	-0.00773
2012-01-01	-0.25334
2012-04-01	-0.21000
2012-07-01	-0.00468
2012-10-01	0.66087
2013-01-01	-0.22247
2013-04-01	-0.06014
2013-07-01	0.40515
2013-10-01	-1.90436
2014-01-01	0.19229
2014-04-01	1.92833
2014-07-01	0.27595
2015-01-01	-0.00418
2015-04-01	0.06371