Quarter	Billions of US Dollars
1989-10-01	0.01700
1990-01-01	-0.00700
1990-04-01	0.01800
1990-07-01	-0.03600
1990-10-01	-0.00700
1991-01-01	-0.00100
1991-04-01	0.10800
1991-07-01	0.01900
1991-10-01	-0.04500
1992-01-01	0.85100
1992-04-01	-0.75400
1992-07-01	-0.05300
1992-10-01	0.07000
1993-01-01	0.06400
1993-04-01	0.14000
1993-07-01	0.60368
1993-10-01	-0.14796
1994-01-01	0.38876
1994-04-01	-0.21740
1994-07-01	-0.10772
1994-10-01	-0.19896
1995-01-01	-0.17313
1995-04-01	-0.02476
1995-07-01	0.09458
1995-10-01	0.00951
1996-01-01	0.00494
1996-04-01	0.55109
1996-07-01	-0.46630
1996-10-01	0.03946
1997-01-01	-0.12575
1997-04-01	-0.02372
1997-07-01	0.11887
1997-10-01	0.03418
1998-01-01	-0.03410
1998-04-01	0.02973
1998-07-01	0.03567
1998-10-01	0.14547
1999-01-01	0.03655
1999-04-01	-0.16542
1999-07-01	0.05752
1999-10-01	0.31627
2000-01-01	-0.25367
2000-04-01	0.17353
2000-07-01	0.02140
2000-10-01	0.00424
2001-01-01	0.38093
2001-04-01	-0.50752
2001-07-01	0.09970
2001-10-01	-0.18864
2002-01-01	0.12669
2002-04-01	-0.07834
2002-07-01	0.45989
2002-10-01	-0.11048
2003-01-01	0.44842
2003-04-01	-0.06804
2003-07-01	0.02236
2003-10-01	0.27543
2004-01-01	-0.28389
2004-04-01	0.20274
2004-07-01	1.20219
2004-10-01	-0.44941
2005-01-01	-0.05290
2005-04-01	0.15062
2005-07-01	0.56198
2005-10-01	-0.61604
2006-01-01	1.36785
2006-04-01	-1.16385
2006-07-01	-1.13116
2006-10-01	1.37082
2007-01-01	-0.71700
2007-04-01	-0.31995
2007-07-01	0.64002
2007-10-01	0.83949
2008-01-01	0.63246
2008-04-01	-1.06847
2008-07-01	-1.27090
2008-10-01	-0.38739
2009-01-01	-0.12173
2009-04-01	0.07617
2009-07-01	-0.22672
2009-10-01	-0.66113
2010-01-01	0.55040
2010-04-01	-0.40933
2010-07-01	0.30695
2010-10-01	0.27879
2011-01-01	0.75204
2011-04-01	-0.44184
2011-07-01	-0.26267
2011-10-01	-0.18532
2012-01-01	0.03461
2012-04-01	0.01006
2012-07-01	-0.11499
2012-10-01	0.04363
2013-01-01	-0.48981
2013-04-01	-0.02286
2013-07-01	-0.08429
2013-10-01	-0.08050
2014-01-01	3.12146
2014-04-01	2.06924
2014-07-01	1.99918
2014-10-01	0.67726
2015-01-01	-2.83326
2015-04-01	-1.44124