Quarter	Billions of US Dollars
1993-07-01	0.57802
1993-10-01	-0.03694
1994-01-01	0.19987
1994-04-01	0.02890
1994-07-01	0.12917
1994-10-01	-0.20142
1995-01-01	-0.00177
1995-04-01	-0.05688
1995-07-01	0.11571
1995-10-01	-0.05050
1996-01-01	-0.17739
1996-04-01	0.00157
1996-07-01	0.20391
1996-10-01	-0.00660
1997-01-01	0.37079
1997-04-01	0.51809
1997-07-01	-0.49900
1997-10-01	-0.28935
1998-01-01	0.01545
1998-04-01	-0.25027
1998-07-01	0.31240
1998-10-01	-0.04411
1999-01-01	0.01676
1999-04-01	-0.51035
1999-07-01	-0.11719
1999-10-01	-0.07523
2000-01-01	-0.08323
2000-04-01	0.49500
2000-07-01	-0.00641
2000-10-01	0.01300
2001-01-01	0.00330
2001-04-01	0.14700
2001-07-01	0.03847
2001-10-01	0.00846
2002-01-01	-0.02564
2002-04-01	0.16088
2002-07-01	0.02255
2002-10-01	-0.01273
2003-01-01	0.02565
2003-04-01	-0.64541
2003-10-01	0.02321
2004-01-01	0.03950
2004-04-01	-0.25321
2004-07-01	-0.01000
2004-10-01	-0.02314
2005-01-01	0.02244
2005-04-01	-0.00514
2005-10-01	0.04514
2006-01-01	0.26105
2006-04-01	0.01611
2006-07-01	0.06437
2006-10-01	-0.00643
2007-01-01	-0.22990
2007-04-01	-0.01599
2007-07-01	-0.07765
2007-10-01	0.05530
2008-01-01	0.11264
2008-04-01	-0.01410
2008-07-01	0.01908
2008-10-01	0.20855
2009-01-01	-0.19320
2009-04-01	-0.01226
2009-07-01	0.14293
2009-10-01	-0.17159
2010-01-01	0.05770
2010-04-01	0.06323
2010-07-01	0.07916
2010-10-01	0.33760
2011-01-01	0.12489
2011-04-01	0.54842
2011-07-01	0.73601
2011-10-01	-0.43935
2012-01-01	1.03040
2012-04-01	0.41003
2012-07-01	-0.59104
2012-10-01	-0.41394
2013-01-01	0.43731
2013-04-01	0.72857
2013-07-01	-0.01846
2013-10-01	1.11899
2014-01-01	1.67447
2014-04-01	0.94166
2014-07-01	-0.52161
2014-10-01	-0.27961
2015-01-01	1.16453
2015-04-01	-1.81404