Quarter	Billions of US Dollars
1987-01-01	-0.06649
1987-04-01	-0.01983
1987-07-01	-0.02839
1988-01-01	-0.12500
1989-01-01	-0.07911
1989-07-01	-0.00036
1990-01-01	-0.08872
1990-04-01	0.59723
1990-07-01	0.10000
1990-10-01	0.24474
1991-01-01	0.93725
1991-04-01	-0.07230
1991-10-01	0.29000
1992-01-01	-0.00040
1992-04-01	0.05909
1992-10-01	0.13980
1993-04-01	0.27970
1993-10-01	0.53500
1994-01-01	0.48905
1994-04-01	0.86194
1994-07-01	0.84152
1994-10-01	0.18444
1995-01-01	-0.36255
1995-04-01	-0.16318
1995-07-01	0.17374
1995-10-01	0.02260
1996-01-01	0.02586
1996-04-01	0.38024
1996-07-01	0.88375
1996-10-01	-0.18229
1997-01-01	0.52850
1997-04-01	1.75792
1997-07-01	0.50200
1997-10-01	-0.01711
1998-01-01	-0.05011
1998-04-01	1.08899
1998-07-01	0.77524
1998-10-01	-0.20993
1999-01-01	-0.68569
1999-04-01	-0.12973
1999-07-01	-0.21822
1999-10-01	0.21494
2000-01-01	-0.06875
2000-04-01	-0.08183
2000-07-01	-1.32989
2000-10-01	-0.15975
2001-01-01	0.00953
2001-04-01	-0.22170
2001-07-01	0.35337
2001-10-01	-0.28053
2002-01-01	-0.37680
2002-04-01	-0.14267
2002-07-01	-0.04757
2002-10-01	0.19711
2003-01-01	0.10012
2003-04-01	0.12292
2003-07-01	0.42367
2003-10-01	-0.15091
2004-01-01	-0.88846
2004-04-01	-0.38253
2004-07-01	-0.40193
2004-10-01	-0.06176
2005-01-01	-0.08855
2005-04-01	-0.18668
2005-07-01	-0.21553
2005-10-01	0.25340
2006-01-01	0.43059
2006-04-01	-0.29928
2006-07-01	0.56847
2006-10-01	1.57452
2007-01-01	1.54288
2007-04-01	0.92260
2007-07-01	2.12447
2007-10-01	0.76216
2008-01-01	1.76757
2008-04-01	1.03781
2008-07-01	0.00347
2008-10-01	-1.00286
2009-01-01	-0.71192
2009-04-01	-0.50289
2009-07-01	-1.05748
2009-10-01	4.17502
2010-01-01	1.88705
2010-04-01	2.37106
2010-07-01	2.41412
2010-10-01	0.52950
2011-01-01	2.82092
2011-04-01	1.34267
2011-07-01	-0.20693
2011-10-01	-0.57625
2012-01-01	2.04949
2012-04-01	0.32250
2012-07-01	0.55192
2012-10-01	1.97759
2013-01-01	-0.52362
2013-04-01	1.93986
2013-07-01	-0.06173
2013-10-01	-1.16950
2014-01-01	1.63211
2014-04-01	2.75726
2014-07-01	1.92230
2014-10-01	-0.87659
2015-01-01	-0.42738
2015-04-01	0.41392