Quarter	Billions of US Dollars
1987-01-01	0.0426
1987-04-01	0.1730
1987-07-01	0.0998
1987-10-01	0.3125
1988-01-01	-0.3101
1988-04-01	-0.0005
1988-07-01	0.3105
1988-10-01	0.0547
1989-01-01	-0.1095
1989-04-01	0.1638
1989-10-01	0.3135
1990-01-01	-0.0020
1990-04-01	-0.2490
1990-07-01	0.3024
1990-10-01	0.2504
1991-01-01	0.6741
1991-04-01	1.0284
1991-07-01	0.1564
1991-10-01	0.0698
1992-01-01	0.4979
1992-04-01	0.1006
1992-07-01	0.5989
1992-10-01	-0.0522
1993-01-01	0.1407
1993-04-01	0.3113
1993-07-01	0.9821
1993-10-01	0.4326
1994-01-01	1.0192
1994-04-01	1.2101
1994-07-01	1.3927
1994-10-01	0.5741
1995-01-01	1.7130
1995-04-01	1.3610
1995-07-01	1.9024
1995-10-01	2.3604
1996-01-01	2.1428
1996-04-01	1.9177
1996-07-01	4.6374
1996-10-01	5.0438
1997-01-01	2.7800
1997-04-01	2.7239
1997-07-01	2.3047
1997-10-01	-0.9191
1998-01-01	-1.4233
1998-04-01	-0.6318
1998-07-01	-1.5694
1998-10-01	-1.1338
1999-01-01	-1.0138
1999-04-01	-0.9015
1999-07-01	-1.7781
1999-10-01	0.1125
2000-01-01	0.9255
2000-04-01	-1.0574
2000-07-01	-0.9285
2000-10-01	-1.4030
2001-01-01	-0.9692
2001-04-01	-1.5753
2001-07-01	-3.2056
2001-10-01	-0.0802
2002-01-01	-1.1105
2002-04-01	0.3857
2002-07-01	0.1264
2002-10-01	0.5386
2003-01-01	0.9318
2003-04-01	2.6491
2003-07-01	2.1641
2003-10-01	1.9479
2004-01-01	4.9338
2004-04-01	1.4852
2004-07-01	1.8167
2004-10-01	3.4665
2005-01-01	3.1079
2005-04-01	1.1812
2005-07-01	2.2384
2005-10-01	3.2707
2006-01-01	1.1319
2006-04-01	3.8473
2006-07-01	4.4351
2006-10-01	1.8870
2007-01-01	4.6991
2007-04-01	7.4639
2007-07-01	2.0010
2007-10-01	3.9131
2008-01-01	1.5604
2008-04-01	2.0763
2008-07-01	0.6359
2008-10-01	-6.9207
2009-01-01	1.8264
2009-04-01	5.5838
2009-07-01	2.7514
2009-10-01	-2.4677
2010-01-01	1.6567
2010-04-01	1.0390
2010-07-01	1.8375
2010-10-01	4.6974
2011-01-01	5.4520
2011-04-01	1.8037
2011-07-01	0.2652
2011-10-01	4.2753
2012-01-01	6.1756
2012-04-01	3.0132
2012-07-01	10.1660
2012-10-01	-3.5755
2013-01-01	4.4771
2013-04-01	1.2019
2013-07-01	10.0120
2013-10-01	6.2857
2014-01-01	3.8635
2014-04-01	3.4277
2014-07-01	4.2281
2014-10-01	28.0276
2015-01-01	1.3111
2015-04-01	8.5117