Quarter	Billions of US Dollars
1993-07-01	0.19378
1993-10-01	-0.34073
1994-01-01	0.17307
1994-04-01	0.10298
1994-07-01	0.00831
1994-10-01	-0.28977
1995-01-01	0.33400
1995-04-01	-0.09115
1995-07-01	0.14761
1995-10-01	-0.32667
1996-01-01	0.74998
1996-04-01	-0.00081
1996-07-01	-0.06500
1996-10-01	-0.40703
1997-01-01	1.37047
1997-04-01	0.34183
1997-07-01	-0.30250
1997-10-01	-1.01575
1998-01-01	0.93907
1998-04-01	0.51354
1998-07-01	0.62876
1998-10-01	-1.27569
1999-01-01	1.12820
1999-04-01	-0.35120
1999-07-01	0.10085
1999-10-01	-1.13166
2000-01-01	1.30659
2000-04-01	0.39758
2000-07-01	2.37743
2000-10-01	-0.82113
2001-01-01	-0.45225
2001-04-01	-0.02065
2001-07-01	-1.57914
2001-10-01	-0.63492
2002-01-01	0.13727
2002-04-01	-0.08538
2002-07-01	0.05578
2002-10-01	0.03856
2003-01-01	0.10598
2003-04-01	0.80722
2003-07-01	-1.41592
2003-10-01	0.62716
2004-01-01	-0.34153
2004-04-01	-0.34316
2004-07-01	-0.16557
2004-10-01	2.45481
2005-01-01	-1.29862
2005-04-01	0.66607
2005-07-01	-0.00644
2005-10-01	-0.30521
2006-01-01	1.12514
2006-04-01	0.25168
2006-07-01	-0.04714
2006-10-01	-0.94820
2007-01-01	2.11009
2007-04-01	-0.21257
2007-07-01	1.39447
2007-10-01	3.75427
2008-01-01	5.70762
2008-04-01	-3.25439
2008-07-01	-1.06303
2008-10-01	2.18083
2009-01-01	-0.23598
2009-04-01	-3.08200
2009-07-01	-0.60562
2009-10-01	-2.94179
2010-01-01	1.12351
2010-04-01	-1.40029
2010-07-01	-0.79043
2010-10-01	-1.89644
2011-01-01	4.16778
2011-04-01	-0.92853
2011-07-01	0.07677
2011-10-01	3.45935
2012-01-01	4.73179
2012-04-01	1.60459
2012-07-01	-0.41016
2012-10-01	-5.96091
2013-01-01	-5.97836
2013-04-01	-0.44405
2013-07-01	-0.05737
2013-10-01	2.28362
2014-01-01	0.48563
2014-04-01	-2.06190
2014-07-01	0.47558
2014-10-01	-1.27661
2015-01-01	-1.15104
2015-04-01	0.84844