Quarter	Billions of US Dollars
1987-04-01	0.2550
1988-01-01	0.3000
1988-07-01	-0.0536
1988-10-01	-0.0293
1989-04-01	-0.0172
1989-10-01	-0.0180
1990-01-01	-0.3000
1990-04-01	-0.0178
1990-10-01	0.0694
1991-01-01	-0.0043
1991-04-01	-0.0169
1991-07-01	0.2653
1992-01-01	0.0164
1992-04-01	0.2648
1992-10-01	0.1500
1993-01-01	-0.0413
1993-04-01	-0.3505
1993-07-01	0.2110
1993-10-01	0.0035
1994-01-01	-0.0515
1994-04-01	-0.1120
1994-07-01	-0.3120
1994-10-01	0.0419
1995-01-01	0.2020
1995-04-01	-0.2810
1995-07-01	0.0489
1995-10-01	-0.1127
1996-01-01	-0.0521
1996-07-01	-0.1335
1997-01-01	0.5281
1997-04-01	-0.0585
1997-10-01	-0.1819
1998-01-01	-0.0234
1998-04-01	0.2220
1998-07-01	0.4020
1998-10-01	-0.0834
1999-01-01	0.3582
1999-04-01	0.7714
1999-07-01	1.4628
1999-10-01	5.5251
2000-01-01	0.4569
2000-04-01	1.4993
2000-07-01	5.5566
2000-10-01	3.7706
2001-01-01	3.5228
2001-04-01	8.2974
2001-07-01	3.3343
2001-10-01	13.9475
2002-01-01	0.7881
2002-04-01	5.4878
2002-07-01	4.0488
2002-10-01	11.7758
2003-01-01	11.0147
2003-04-01	4.7723
2003-07-01	1.6472
2003-10-01	4.8357
2004-01-01	6.0700
2004-04-01	4.0103
2004-07-01	-1.3670
2004-10-01	6.6722
2005-01-01	-1.0975
2005-04-01	13.0840
2005-07-01	-0.9387
2005-10-01	12.3534
2006-01-01	2.5966
2006-04-01	3.3350
2006-07-01	4.1037
2006-10-01	10.0797
2007-01-01	8.0880
2007-04-01	12.7957
2007-07-01	-0.1892
2007-10-01	0.1364
2008-01-01	2.4355
2008-04-01	2.7105
2008-07-01	21.4689
2008-10-01	54.7802
2009-01-01	18.9264
2009-04-01	5.3336
2009-07-01	18.1789
2009-10-01	12.6101
2010-01-01	-3.6694
2010-04-01	-1.0044
2010-07-01	1.2195
2010-10-01	4.3831
2011-01-01	-2.4244
2011-04-01	-0.8865
2011-07-01	-5.2654
2011-10-01	8.4505
2012-01-01	-28.1027
2012-04-01	-7.8328
2012-07-01	-5.2728
2012-10-01	-4.2962
2013-01-01	-4.9026
2013-04-01	-3.0224
2013-07-01	3.3998
2013-10-01	6.0485
2014-01-01	2.0541
2014-04-01	12.5676
2014-07-01	-1.3308
2014-10-01	5.8919
2015-01-01	5.0516
2015-04-01	4.3867