Quarter	Billions of US Dollars
1993-07-01	1.69627
1993-10-01	-0.40527
1994-01-01	0.27321
1994-04-01	-0.24332
1994-07-01	0.18726
1994-10-01	-0.24536
1995-01-01	-0.13309
1995-04-01	-0.11695
1995-07-01	0.45312
1995-10-01	-0.39760
1996-01-01	0.30730
1996-04-01	0.04811
1996-07-01	-0.50119
1996-10-01	0.32758
1997-01-01	0.21137
1997-04-01	0.01786
1997-07-01	-0.34955
1997-10-01	1.07425
1998-01-01	-0.57140
1998-04-01	-0.57562
1998-07-01	0.03212
1998-10-01	0.11118
1999-01-01	-0.30019
1999-04-01	0.01838
1999-07-01	0.34503
1999-10-01	0.02714
2000-01-01	-0.19576
2000-04-01	-0.26480
2000-07-01	-0.18501
2000-10-01	0.10801
2001-01-01	-0.04889
2001-04-01	0.01058
2001-07-01	-0.09013
2001-10-01	-0.23721
2002-01-01	0.23315
2002-04-01	-0.37965
2002-07-01	0.16342
2002-10-01	0.12405
2003-01-01	0.10210
2003-04-01	-0.07625
2003-07-01	0.67562
2003-10-01	-0.78776
2004-01-01	0.93861
2004-04-01	-0.28337
2004-07-01	-0.05107
2004-10-01	0.07055
2005-01-01	0.64442
2005-04-01	0.06211
2005-07-01	0.26916
2005-10-01	0.05997
2006-01-01	2.66344
2006-04-01	-0.87303
2006-07-01	-0.32484
2006-10-01	-0.19456
2007-01-01	1.08035
2007-04-01	-0.14189
2007-07-01	0.25454
2007-10-01	-0.64226
2008-01-01	-0.63978
2008-04-01	0.68853
2008-07-01	0.07970
2008-10-01	3.21523
2009-01-01	1.82048
2009-04-01	1.53455
2009-07-01	-0.09751
2009-10-01	0.76430
2010-01-01	-0.93488
2010-04-01	0.36201
2010-07-01	-0.17257
2010-10-01	1.08505
2011-01-01	0.38395
2011-04-01	-1.54112
2011-07-01	-1.18580
2011-10-01	-0.48326
2012-01-01	0.14772
2012-04-01	-0.26356
2012-07-01	-0.43190
2012-10-01	-0.84369
2013-01-01	1.29780
2013-04-01	-0.35771
2013-07-01	0.19761
2013-10-01	-0.48313
2014-01-01	1.26567
2014-04-01	0.18171
2014-07-01	-1.67252
2014-10-01	0.90485
2015-01-01	-0.09741
2015-04-01	-0.40764