Quarter	Billions of US Dollars
1993-07-01	0.43052
1993-10-01	-0.01894
1994-01-01	0.17212
1994-04-01	0.08290
1994-07-01	0.16357
1994-10-01	-0.26839
1995-01-01	0.05264
1995-04-01	0.03224
1995-07-01	0.07520
1995-10-01	0.17363
1996-01-01	-0.30651
1996-04-01	-0.04744
1996-07-01	0.60021
1996-10-01	-0.02550
1997-01-01	0.12440
1997-04-01	0.50734
1997-07-01	-0.24346
1997-10-01	-0.04829
1998-01-01	0.32221
1998-04-01	-0.24306
1998-07-01	0.31140
1998-10-01	0.00080
1999-01-01	-0.06809
1999-04-01	-0.37035
1999-07-01	-0.19142
1999-10-01	0.16631
2000-01-01	-0.04950
2000-04-01	0.48786
2000-07-01	0.03848
2000-10-01	0.14718
2001-01-01	0.11559
2001-04-01	0.15000
2001-07-01	-0.02565
2001-10-01	-0.15181
2002-01-01	0.25644
2002-04-01	0.28283
2002-07-01	0.08334
2002-10-01	-0.03128
2003-01-01	0.11758
2003-04-01	-0.63246
2003-07-01	-0.36331
2003-10-01	-0.21553
2004-01-01	0.04500
2004-04-01	-0.31350
2004-07-01	-0.05270
2004-10-01	0.23543
2005-01-01	0.10886
2005-04-01	0.35194
2005-07-01	0.40355
2005-10-01	-0.05612
2006-01-01	0.52585
2006-04-01	0.69777
2006-07-01	0.08357
2006-10-01	0.15523
2007-01-01	0.59711
2007-04-01	0.49744
2007-07-01	-0.05437
2007-10-01	-0.06116
2008-01-01	-0.13562
2008-04-01	-0.12513
2008-07-01	0.18408
2008-10-01	-0.04783
2009-01-01	0.64165
2009-04-01	-0.02942
2009-07-01	1.14473
2009-10-01	0.15816
2010-01-01	0.20232
2010-04-01	-0.19286
2010-07-01	0.70404
2010-10-01	0.10335
2011-01-01	-0.04049
2011-04-01	0.55436
2011-07-01	-1.08245
2011-10-01	0.40784
2012-01-01	0.29581
2012-04-01	0.89835
2012-07-01	-0.12356
2012-10-01	0.01844
2013-01-01	0.13187
2013-04-01	0.82728
2013-07-01	-0.01816
2013-10-01	0.45075
2014-01-01	1.83141
2014-04-01	1.67151
2014-07-01	-0.55485
2014-10-01	0.79536
2015-01-01	0.63957
2015-04-01	-1.69979