Quarter	Billions of US Dollars
1993-07-01	0.25823
1993-10-01	0.22457
1994-01-01	-0.04645
1994-04-01	0.21499
1994-07-01	0.04323
1994-10-01	-0.07286
1995-01-01	0.07580
1995-04-01	-0.18714
1995-07-01	0.31403
1995-10-01	0.81194
1996-01-01	0.63110
1996-04-01	0.38517
1996-07-01	0.69830
1996-10-01	0.40143
1997-01-01	-0.45347
1997-04-01	-0.00748
1997-07-01	-0.25408
1997-10-01	-0.41855
1998-01-01	-0.01320
1998-04-01	-0.47965
1998-07-01	-0.22827
1998-10-01	0.82723
1999-01-01	1.39960
1999-04-01	-0.35133
1999-07-01	1.20887
1999-10-01	-0.85982
2000-01-01	1.20043
2000-04-01	-0.27314
2000-07-01	-0.24868
2000-10-01	0.40628
2001-01-01	-0.15351
2001-04-01	-1.09927
2001-07-01	-0.63638
2001-10-01	1.01401
2002-01-01	-0.24134
2002-04-01	-0.66866
2002-07-01	-0.05810
2002-10-01	-0.20133
2003-01-01	0.16168
2003-04-01	-0.34405
2003-07-01	-0.06553
2003-10-01	0.12840
2004-01-01	0.21565
2004-04-01	0.63704
2004-07-01	0.14125
2004-10-01	-1.32915
2005-01-01	0.42670
2005-04-01	0.78086
2005-07-01	0.14561
2005-10-01	0.74580
2006-01-01	0.18735
2006-04-01	-0.08210
2006-07-01	-0.57757
2006-10-01	0.33348
2007-01-01	1.46277
2007-04-01	0.27820
2007-07-01	-1.18101
2007-10-01	1.83757
2008-01-01	0.42143
2008-04-01	0.50955
2008-07-01	-1.69288
2008-10-01	-1.57806
2009-01-01	2.08327
2009-04-01	-1.44232
2009-07-01	0.55071
2009-10-01	-0.94041
2010-01-01	-1.00188
2010-04-01	0.50361
2010-07-01	-0.29988
2010-10-01	-2.00957
2011-01-01	-0.02429
2011-04-01	1.38699
2011-07-01	-0.70395
2011-10-01	-1.59999
2012-01-01	0.23523
2012-04-01	-0.18969
2012-07-01	-0.83189
2012-10-01	-0.15967
2013-01-01	-0.01902
2013-04-01	-0.13612
2013-07-01	0.80094
2013-10-01	1.05768
2014-01-01	0.59481
2014-04-01	0.44464
2014-07-01	-1.00643
2014-10-01	-0.03775
2015-01-01	-1.11791
2015-04-01	-0.25688