Quarter	Billions of US Dollars
1987-04-01	0.10000
1987-10-01	0.03510
1989-01-01	-0.06329
1989-04-01	-0.01345
1989-07-01	-0.02344
1990-07-01	-0.02223
1990-10-01	-0.21791
1992-01-01	0.06500
1993-07-01	0.05835
1993-10-01	0.05308
1994-01-01	0.07826
1994-04-01	-0.27540
1994-07-01	0.04885
1994-10-01	0.01866
1995-01-01	-0.02117
1995-04-01	-0.02823
1995-07-01	0.02962
1995-10-01	0.37613
1996-01-01	0.34499
1996-04-01	-0.02672
1996-07-01	-0.19541
1996-10-01	0.76884
1997-01-01	0.22691
1997-04-01	0.19675
1997-07-01	-0.17559
1997-10-01	0.57528
1998-01-01	0.04259
1998-04-01	-0.22701
1998-07-01	-0.01568
1998-10-01	0.12982
1999-01-01	-0.01105
1999-04-01	-0.23225
1999-07-01	0.43481
1999-10-01	0.23464
2000-01-01	-0.09447
2000-04-01	0.59610
2000-07-01	-0.61662
2000-10-01	0.80047
2001-01-01	0.63529
2001-04-01	0.25917
2001-07-01	-0.41834
2001-10-01	0.32323
2002-01-01	-0.32939
2002-04-01	-0.68133
2002-07-01	0.64034
2002-10-01	-0.59585
2003-01-01	0.64859
2003-04-01	-0.49091
2003-07-01	-0.17578
2003-10-01	-0.40210
2004-01-01	0.65096
2004-04-01	0.18582
2004-07-01	0.36838
2004-10-01	0.73979
2005-01-01	-0.43385
2005-04-01	-0.96208
2005-07-01	0.03179
2005-10-01	-0.94428
2006-01-01	-0.27366
2006-04-01	-0.00155
2006-07-01	-0.05721
2006-10-01	0.25308
2007-01-01	-0.06086
2007-04-01	0.10228
2007-07-01	-0.20469
2007-10-01	-0.04401
2008-01-01	-0.05000
2008-04-01	0.12693
2008-07-01	0.07328
2008-10-01	-0.37761
2009-01-01	0.01554
2009-04-01	-0.13762
2009-07-01	-0.02500
2010-01-01	0.19801
2010-04-01	0.12660
2010-07-01	0.00805
2010-10-01	0.17717
2011-01-01	-0.01831
2011-04-01	0.11600
2011-07-01	0.01545
2011-10-01	-0.04144
2012-01-01	-0.04240
2012-04-01	-0.27448
2012-07-01	0.00339
2012-10-01	-0.00305
2013-01-01	-0.14393
2013-04-01	1.49932
2013-07-01	0.04625
2013-10-01	-0.26744
2014-01-01	-0.08116
2014-04-01	0.80000
2014-07-01	-0.17445
2014-10-01	0.08109