Quarter	Billions of US Dollars
1980-07-01	0.0250
1982-01-01	0.0429
1982-04-01	0.0205
1983-04-01	0.0400
1983-07-01	0.0202
1984-10-01	0.0830
1985-01-01	0.1157
1985-04-01	0.1289
1985-07-01	0.2945
1985-10-01	0.2061
1986-01-01	0.3527
1986-04-01	0.3889
1986-07-01	0.3289
1986-10-01	0.1563
1987-01-01	0.1915
1987-04-01	0.2000
1987-07-01	0.2163
1987-10-01	0.3644
1988-01-01	0.2299
1988-04-01	0.1576
1988-07-01	0.2390
1988-10-01	0.1936
1989-04-01	0.1538
1990-07-01	-0.0386
1991-07-01	0.1429
1991-10-01	0.0224
1992-01-01	-0.1555
1992-04-01	0.0480
1992-07-01	0.2189
1992-10-01	-0.0036
1993-01-01	-0.2892
1993-04-01	0.3362
1993-07-01	1.3409
1993-10-01	0.3236
1994-01-01	1.4071
1994-04-01	0.4218
1994-07-01	1.2187
1994-10-01	0.4685
1995-01-01	-0.1412
1995-04-01	-0.2369
1995-07-01	0.7592
1995-10-01	-0.1044
1996-01-01	-0.0919
1996-04-01	-0.1859
1996-07-01	1.4215
1996-10-01	0.3284
1997-01-01	0.6665
1997-04-01	1.4777
1997-07-01	0.0132
1997-10-01	0.4137
1998-04-01	-0.7598
1998-07-01	-0.8607
1998-10-01	0.6122
1999-01-01	-0.4500
1999-04-01	0.2271
1999-07-01	-0.4248
1999-10-01	-0.0818
2000-01-01	-0.2891
2000-04-01	0.0293
2000-07-01	-0.2471
2001-01-01	-0.1500
2001-04-01	1.3595
2001-07-01	-1.4071
2001-10-01	0.1516
2002-01-01	0.8600
2002-04-01	-1.1348
2002-07-01	-0.4045
2002-10-01	-0.9380
2003-01-01	-0.3000
2003-07-01	-0.1333
2003-10-01	0.9654
2004-01-01	-0.8500
2004-04-01	-0.5000
2004-07-01	0.5297
2004-10-01	2.8218
2005-01-01	-0.0955
2005-04-01	-0.2000
2005-07-01	1.2303
2005-10-01	1.0000
2006-01-01	-0.2567
2006-04-01	-0.7778
2006-07-01	-0.5088
2006-10-01	-0.1500
2007-01-01	0.7760
2007-04-01	2.0474
2007-07-01	1.1340
2007-10-01	0.2625
2008-01-01	0.5750
2008-04-01	0.0045
2008-07-01	2.3061
2008-10-01	-1.5284
2009-04-01	-0.4834
2009-07-01	0.8782
2009-10-01	0.8814
2010-01-01	0.0576
2010-04-01	-0.3416
2010-07-01	-1.1244
2010-10-01	2.0340
2011-01-01	0.5245
2011-04-01	1.7477
2011-07-01	0.5047
2011-10-01	0.6395
2012-01-01	1.0561
2012-04-01	7.7992
2012-07-01	2.1650
2012-10-01	2.2105
2013-01-01	1.8123
2013-04-01	1.8447
2013-07-01	1.4145
2013-10-01	4.0508
2014-01-01	1.4046
2014-04-01	3.1425
2014-07-01	2.0868
2014-10-01	19.7944
2015-01-01	-0.6387
2015-04-01	2.5993