Quarter	Billions of US Dollars
1993-07-01	-0.11921
1994-01-01	0.23489
1994-04-01	0.05432
1994-07-01	0.06971
1994-10-01	0.01800
1995-01-01	0.09000
1995-04-01	0.06960
1995-07-01	0.05311
1995-10-01	-0.07800
1996-01-01	0.28346
1996-04-01	-0.02200
1996-07-01	-0.07196
1996-10-01	0.26116
1997-01-01	-0.11549
1997-04-01	0.60000
1997-07-01	-0.08479
1998-01-01	0.00000
1998-04-01	0.10000
1998-10-01	-0.10000
1999-04-01	0.04000
1999-07-01	-0.24000
2000-01-01	-0.18681
2000-04-01	0.37346
2000-07-01	-0.36459
2000-10-01	0.28975
2001-01-01	-0.00847
2001-04-01	0.19516
2001-07-01	0.04373
2001-10-01	0.01166
2002-01-01	-0.44000
2002-07-01	1.23800
2002-10-01	-0.29973
2003-01-01	-0.02814
2003-04-01	0.21290
2003-07-01	-0.41300
2003-10-01	0.17200
2004-01-01	-0.55830
2004-04-01	0.90000
2004-07-01	0.06653
2004-10-01	0.24200
2005-01-01	-0.00090
2005-04-01	0.72755
2005-07-01	-0.84283
2005-10-01	-0.10000
2006-01-01	-0.08042
2006-04-01	0.50000
2006-07-01	0.18677
2006-10-01	-0.71376
2007-01-01	-0.00394
2007-04-01	-1.60000
2007-10-01	-0.21160
2008-01-01	-0.14986
2008-04-01	-0.23060
2008-10-01	-0.04162
2009-01-01	-0.16670
2009-10-01	-0.13366
2011-04-01	-0.30598
2013-04-01	-0.20263
2015-04-01	-0.03232