Quarter	Billions of US Dollars
1993-07-01	-0.64286
1993-10-01	-0.09090
1994-01-01	0.00586
1994-04-01	-0.44422
1994-07-01	-0.23177
1994-10-01	-0.29679
1995-01-01	-0.08844
1995-04-01	0.00882
1995-07-01	0.06284
1995-10-01	0.04817
1996-01-01	-0.81339
1996-04-01	-0.63136
1996-07-01	-0.17018
1996-10-01	0.29724
1997-01-01	0.41444
1997-04-01	-0.17682
1997-07-01	-0.27595
1997-10-01	0.23982
1998-01-01	0.20739
1998-04-01	1.20004
1998-07-01	-0.18680
1998-10-01	0.20182
1999-01-01	0.47739
1999-04-01	2.55178
1999-07-01	0.78035
1999-10-01	0.58090
2000-01-01	1.01995
2000-04-01	-1.13148
2000-07-01	1.35339
2000-10-01	0.93359
2001-01-01	1.74455
2001-04-01	3.78593
2001-07-01	-0.96546
2001-10-01	1.05525
2002-01-01	0.04252
2002-04-01	0.14331
2002-07-01	-0.65290
2002-10-01	0.04468
2003-01-01	-0.41029
2003-04-01	-0.43048
2003-07-01	-0.73030
2003-10-01	-0.43413
2004-01-01	0.52705
2004-04-01	-0.17645
2004-07-01	-0.89414
2004-10-01	-0.41339
2005-01-01	-1.40184
2005-04-01	2.64756
2005-07-01	0.03154
2005-10-01	-0.08863
2006-01-01	-0.74231
2006-04-01	-2.53907
2006-07-01	-0.09657
2006-10-01	0.66050
2007-01-01	1.60196
2007-04-01	6.99497
2007-07-01	-0.17243
2007-10-01	1.33680
2008-01-01	-1.78250
2008-04-01	-0.74576
2008-07-01	-0.04437
2008-10-01	-0.05635
2009-01-01	5.81590
2009-04-01	3.73055
2009-07-01	-0.35245
2009-10-01	0.69827
2010-01-01	0.25462
2010-04-01	-2.24987
2010-07-01	-0.29796
2010-10-01	0.94796
2011-01-01	4.16811
2011-04-01	4.68886
2011-07-01	2.02362
2011-10-01	1.31317
2012-01-01	5.00061
2012-04-01	-1.45078
2012-07-01	1.11003
2012-10-01	1.09206
2013-01-01	-0.14803
2013-04-01	-1.21755
2013-07-01	0.75649
2013-10-01	2.14129
2014-01-01	-0.97640
2014-04-01	1.87179
2014-07-01	-0.56680
2014-10-01	1.32684
2015-01-01	2.86313
2015-04-01	0.48540