Quarter	Billions of US Dollars
1987-04-01	0.1500
1989-10-01	-0.0500
1991-04-01	0.1250
1991-07-01	0.1551
1993-04-01	0.1500
1993-07-01	0.8500
1993-10-01	1.8069
1994-01-01	1.6052
1994-04-01	0.5327
1994-07-01	0.2587
1994-10-01	2.0453
1995-01-01	0.1820
1995-04-01	0.0204
1995-07-01	0.0036
1995-10-01	0.2821
1996-01-01	0.0962
1996-04-01	0.8240
1996-07-01	0.4602
1996-10-01	0.6254
1997-01-01	1.5998
1997-04-01	1.8642
1997-07-01	2.7356
1997-10-01	-0.1620
1998-01-01	-0.1113
1998-04-01	0.0701
1998-07-01	-0.8284
1998-10-01	-1.1230
1999-01-01	2.2494
1999-04-01	0.3560
1999-07-01	-0.1386
1999-10-01	-0.6224
2000-01-01	0.2434
2000-04-01	-0.5643
2000-07-01	4.4073
2000-10-01	-0.0021
2001-01-01	3.6473
2001-04-01	0.8487
2001-07-01	-0.0585
2001-10-01	-0.3030
2002-01-01	-0.9906
2002-04-01	-0.4625
2002-07-01	0.1640
2002-10-01	-0.1262
2003-01-01	1.4608
2003-04-01	1.2355
2003-07-01	-0.7043
2003-10-01	5.0521
2004-01-01	-1.1280
2004-04-01	0.0624
2004-07-01	-0.1091
2004-10-01	1.2811
2005-01-01	1.3267
2005-04-01	1.2992
2005-07-01	1.8302
2005-10-01	0.8953
2006-01-01	-0.5576
2006-04-01	0.7430
2006-07-01	1.4411
2006-10-01	2.5492
2007-01-01	-0.4352
2007-04-01	2.4459
2007-07-01	-1.1280
2007-10-01	0.5859
2008-01-01	0.5866
2008-04-01	2.5300
2008-07-01	0.9192
2008-10-01	-1.2785
2009-01-01	-0.8478
2009-04-01	0.4144
2009-07-01	5.3262
2009-10-01	2.4037
2010-01-01	0.6546
2010-04-01	-0.5071
2010-07-01	3.1729
2010-10-01	2.1580
2011-01-01	-1.0262
2011-04-01	1.2657
2011-07-01	1.3357
2011-10-01	0.0065
2012-01-01	11.4798
2012-04-01	7.2766
2012-07-01	2.2294
2012-10-01	3.4758
2013-01-01	2.0123
2013-04-01	4.2637
2013-07-01	-1.3942
2013-10-01	0.5293
2014-01-01	3.7430
2014-04-01	0.4183
2014-07-01	3.7371
2014-10-01	4.9790
2015-01-01	2.2671
2015-04-01	0.0107