Quarter	Billions of US Dollars
1987-04-01	0.2000
1987-07-01	0.0998
1987-10-01	0.2000
1988-01-01	0.1175
1988-07-01	0.1256
1988-10-01	0.1110
1989-04-01	0.1538
1991-07-01	0.1429
1992-04-01	-0.0629
1992-07-01	0.1489
1992-10-01	-0.0500
1993-04-01	0.0362
1993-07-01	0.3942
1993-10-01	0.0200
1994-01-01	0.5000
1994-04-01	0.1456
1994-07-01	0.3265
1994-10-01	0.1220
1995-01-01	0.1705
1995-04-01	-0.2369
1995-10-01	-0.2906
1996-01-01	0.2860
1996-04-01	-0.0709
1996-07-01	-0.4801
1997-01-01	0.3411
1997-04-01	0.5300
1997-07-01	-0.0686
1998-04-01	-0.5788
1998-07-01	-0.4500
1998-10-01	-0.1252
1999-01-01	-0.4000
1999-04-01	0.4846
1999-07-01	-0.1608
1999-10-01	0.2052
2000-01-01	-0.1401
2000-04-01	0.0593
2000-07-01	-0.0700
2001-04-01	-0.1223
2001-07-01	-0.1396
2001-10-01	0.3700
2002-01-01	1.0000
2002-04-01	-0.5000
2002-07-01	-0.2200
2002-10-01	-0.2939
2003-07-01	0.0155
2004-01-01	0.1500
2004-04-01	-0.3000
2004-07-01	1.0000
2004-10-01	0.7987
2005-04-01	-0.2000
2005-07-01	1.5000
2005-10-01	1.0000
2006-01-01	-0.2567
2006-07-01	-0.0033
2007-01-01	0.2200
2007-04-01	0.5500
2007-07-01	1.3189
2008-07-01	1.7431
2009-04-01	-0.5000
2009-07-01	0.8782
2010-04-01	-0.3678
2010-07-01	-1.5771
2010-10-01	0.8097
2011-07-01	-2.7548
2011-10-01	-0.0465
2012-01-01	0.5577
2012-04-01	1.2636
2012-07-01	1.1025
2012-10-01	0.2473
2013-01-01	0.4852
2013-04-01	0.0104
2013-07-01	-0.1059
2013-10-01	0.8728
2014-01-01	1.7321
2014-04-01	1.6644
2014-07-01	3.0272
2014-10-01	19.2318
2015-01-01	-0.2001
2015-04-01	1.8657