Quarter	Billions of US Dollars
1987-01-01	0.2006
1987-04-01	0.2918
1987-07-01	-0.0819
1987-10-01	0.1157
1988-01-01	0.4436
1988-04-01	0.3751
1988-07-01	0.0566
1988-10-01	0.1244
1989-01-01	0.2169
1989-04-01	0.1870
1989-07-01	0.1299
1989-10-01	0.8596
1990-01-01	-0.0875
1990-04-01	0.5818
1990-07-01	0.4948
1990-10-01	0.2476
1991-01-01	0.3181
1991-04-01	-0.1111
1991-07-01	0.7778
1991-10-01	0.1337
1992-01-01	0.2459
1992-04-01	0.2734
1992-07-01	0.7726
1992-10-01	-0.2483
1993-01-01	-0.4870
1993-04-01	0.3331
1993-07-01	0.6696
1993-10-01	0.3060
1994-01-01	-0.1675
1994-04-01	-0.6082
1994-07-01	0.2678
1994-10-01	0.6534
1995-01-01	1.0602
1995-04-01	-0.0669
1995-07-01	0.5453
1995-10-01	0.5806
1996-01-01	0.6491
1996-04-01	0.8762
1996-07-01	0.5674
1996-10-01	0.2728
1997-01-01	0.9400
1997-04-01	0.5687
1997-07-01	1.1404
1997-10-01	-0.1320
1998-01-01	1.7510
1998-04-01	0.9412
1998-07-01	0.0193
1998-10-01	0.7135
1999-01-01	0.7779
1999-04-01	1.9747
1999-07-01	1.3853
1999-10-01	2.0759
2000-01-01	2.3068
2000-04-01	3.1385
2000-07-01	4.6665
2000-10-01	0.5284
2001-01-01	3.4366
2001-04-01	1.2578
2001-07-01	0.1884
2001-10-01	2.3855
2002-01-01	3.7487
2002-04-01	3.4787
2002-07-01	-0.3682
2002-10-01	0.4432
2003-01-01	1.3046
2003-04-01	2.5601
2003-07-01	2.2671
2003-10-01	0.4410
2004-01-01	7.3536
2004-04-01	1.0179
2004-07-01	2.0396
2004-10-01	0.0378
2005-01-01	9.0401
2005-04-01	3.2948
2005-07-01	1.7347
2005-10-01	5.2261
2006-01-01	5.0579
2006-04-01	5.1976
2006-07-01	1.9298
2006-10-01	9.6351
2007-01-01	17.0394
2007-04-01	2.8471
2007-07-01	-0.6771
2007-10-01	7.0543
2008-01-01	4.3009
2008-04-01	-2.2090
2008-07-01	3.4501
2008-10-01	0.5224
2009-01-01	0.5069
2009-04-01	1.9759
2009-07-01	-0.0649
2009-10-01	-6.0940
2010-01-01	-2.4801
2010-04-01	-4.5596
2010-07-01	2.6561
2010-10-01	-3.9758
2011-01-01	0.3845
2011-04-01	-8.3430
2011-07-01	4.1330
2011-10-01	-5.8929
2012-01-01	-6.5262
2012-04-01	-5.7732
2012-07-01	-0.4901
2012-10-01	1.1287
2013-01-01	-6.0010
2013-04-01	0.7596
2013-07-01	-7.7017
2013-10-01	2.6044
2014-01-01	-9.4987
2014-04-01	-3.4129
2014-07-01	-3.5496
2014-10-01	-0.1426
2015-01-01	-1.9469
2015-04-01	-3.7296