Quarter	Billions of US Dollars
1987-01-01	0.1488
1987-04-01	0.1012
1987-07-01	0.0327
1987-10-01	0.8554
1988-01-01	0.2734
1988-04-01	0.5988
1988-07-01	0.1792
1988-10-01	0.2444
1989-01-01	0.5148
1989-04-01	0.5264
1989-07-01	0.5842
1989-10-01	0.0822
1990-01-01	0.1632
1990-04-01	0.4037
1990-07-01	0.5794
1990-10-01	0.1961
1991-01-01	1.5661
1991-04-01	1.0874
1991-07-01	-0.0274
1991-10-01	0.0492
1992-01-01	-0.0371
1992-04-01	0.4086
1992-07-01	0.6380
1992-10-01	0.2017
1993-01-01	0.4576
1993-04-01	-0.1260
1993-07-01	4.0679
1993-10-01	1.7458
1994-01-01	2.7782
1994-04-01	3.1653
1994-07-01	1.9602
1994-10-01	3.6987
1995-01-01	2.2601
1995-04-01	3.3268
1995-07-01	4.4025
1995-10-01	2.8250
1996-01-01	3.3122
1996-04-01	3.9964
1996-07-01	0.2095
1996-10-01	1.7534
1997-01-01	4.3697
1997-04-01	-1.4809
1997-07-01	6.0538
1997-10-01	2.1811
1998-01-01	7.3644
1998-04-01	3.1894
1998-07-01	2.1712
1998-10-01	-1.1922
1999-01-01	2.4715
1999-04-01	5.6089
1999-07-01	1.7063
1999-10-01	4.5970
2000-01-01	12.7328
2000-04-01	1.1249
2000-07-01	6.3811
2000-10-01	6.0173
2001-01-01	12.2380
2001-04-01	2.1008
2001-07-01	0.8475
2001-10-01	-2.0042
2002-01-01	0.1533
2002-04-01	10.4377
2002-07-01	-5.1387
2002-10-01	-2.8872
2003-01-01	5.1719
2003-04-01	-1.8822
2003-07-01	-4.5625
2003-10-01	-2.6480
2004-01-01	-5.8302
2004-04-01	-7.5517
2004-07-01	-1.3676
2004-10-01	-2.3151
2005-01-01	0.6290
2005-04-01	-6.4120
2005-07-01	0.1318
2005-10-01	0.0966
2006-01-01	6.5715
2006-04-01	1.5072
2006-07-01	3.6821
2006-10-01	5.1269
2007-01-01	1.9685
2007-04-01	3.5517
2007-07-01	-5.9887
2007-10-01	-0.4966
2008-01-01	-5.7655
2008-04-01	-8.2726
2008-07-01	-12.1811
2008-10-01	-7.6117
2009-01-01	-0.9445
2009-04-01	2.5394
2009-07-01	-2.8422
2009-10-01	-7.7050
2010-01-01	-2.2855
2010-04-01	-1.9269
2010-07-01	1.1155
2010-10-01	-1.3225
2011-01-01	-6.6974
2011-04-01	-0.0335
2011-07-01	-3.2883
2011-10-01	-2.5769
2012-01-01	7.8778
2012-04-01	-0.8125
2012-07-01	3.3099
2012-10-01	5.8064
2013-01-01	4.1753
2013-04-01	1.0168
2013-07-01	-0.1957
2013-10-01	-2.0508
2014-01-01	0.8154
2014-04-01	-0.1263
2014-07-01	-1.2160
2014-10-01	-4.4313
2015-01-01	-5.5143
2015-04-01	1.3044