Quarter	Billions of US Dollars
1993-07-01	3.0166
1993-10-01	-1.4310
1994-01-01	-0.4850
1994-04-01	-0.2362
1994-07-01	0.1653
1994-10-01	-0.2811
1995-01-01	1.5851
1995-04-01	0.1400
1995-07-01	-1.0028
1995-10-01	0.1017
1996-01-01	-0.8989
1996-04-01	0.3040
1996-07-01	0.5161
1996-10-01	-0.0775
1997-01-01	0.0413
1997-04-01	-0.6221
1997-07-01	-0.2616
1997-10-01	0.2533
1998-01-01	0.1257
1998-04-01	-0.2696
1998-07-01	1.4628
1998-10-01	-1.1279
1999-01-01	0.5729
1999-04-01	-0.0017
1999-07-01	-0.2487
1999-10-01	0.4153
2000-01-01	-0.6677
2000-04-01	0.3831
2000-07-01	-0.0265
2000-10-01	0.4684
2001-01-01	1.2342
2001-04-01	-0.8917
2001-07-01	0.4614
2001-10-01	-0.3092
2002-01-01	0.2806
2002-04-01	-1.1628
2002-07-01	0.0017
2002-10-01	0.1041
2003-01-01	1.5496
2003-04-01	0.6691
2003-07-01	-0.3804
2003-10-01	1.1965
2004-01-01	1.3944
2004-04-01	-0.9983
2004-07-01	-0.3190
2004-10-01	0.4263
2005-01-01	-0.2883
2005-04-01	-1.0387
2005-07-01	-0.1495
2005-10-01	0.7817
2006-01-01	-0.0639
2006-04-01	0.5300
2006-07-01	-0.8445
2006-10-01	1.2378
2007-01-01	0.1227
2007-04-01	0.5004
2007-07-01	-0.7960
2007-10-01	-2.7686
2008-01-01	2.0080
2008-04-01	1.7196
2008-07-01	3.5691
2008-10-01	10.6909
2009-01-01	1.1226
2009-04-01	-1.4377
2009-07-01	-0.1285
2009-10-01	-3.9439
2010-01-01	0.3178
2010-04-01	-4.1740
2010-07-01	0.9136
2010-10-01	-2.3635
2011-01-01	-1.6821
2011-04-01	-2.5009
2011-07-01	-0.5403
2011-10-01	0.4174
2012-01-01	1.2515
2012-04-01	-1.4985
2012-07-01	-0.1321
2012-10-01	0.2162
2013-01-01	-0.4077
2013-04-01	0.1453
2013-07-01	0.5890
2013-10-01	-1.2196
2014-01-01	-0.8310
2014-04-01	0.0200
2014-07-01	0.4932
2014-10-01	0.3794
2015-01-01	-0.8529
2015-04-01	0.4779