Quarter	Billions of US Dollars
1993-07-01	6.4299
1993-10-01	-0.3369
1994-01-01	0.0472
1994-04-01	-0.7688
1994-07-01	-0.0112
1994-10-01	-0.9603
1995-01-01	1.2834
1995-04-01	-1.3343
1995-07-01	0.9057
1995-10-01	0.5584
1996-01-01	0.6380
1996-04-01	5.9899
1996-07-01	-0.0969
1996-10-01	-1.6890
1997-01-01	2.4376
1997-04-01	-2.2553
1997-07-01	3.3006
1997-10-01	0.3273
1998-01-01	2.9446
1998-04-01	-2.7198
1998-07-01	2.2536
1998-10-01	-0.4630
1999-01-01	1.9742
1999-04-01	-2.4258
1999-07-01	1.2928
1999-10-01	0.6713
2000-01-01	2.3878
2000-04-01	-0.0214
2000-07-01	3.3624
2000-10-01	1.5948
2001-01-01	1.6110
2001-04-01	-1.2884
2001-07-01	-0.9871
2001-10-01	-1.5051
2002-01-01	-1.3938
2002-04-01	1.4969
2002-07-01	-3.8087
2002-10-01	4.5666
2003-01-01	-1.6970
2003-04-01	1.8202
2003-07-01	1.5750
2003-10-01	2.5629
2004-01-01	4.2366
2004-04-01	5.0171
2004-07-01	4.2583
2004-10-01	1.0428
2005-01-01	10.4146
2005-04-01	-0.9701
2005-07-01	1.3643
2005-10-01	-2.7711
2006-01-01	1.9916
2006-04-01	-4.5193
2006-07-01	-3.3132
2006-10-01	7.0095
2007-01-01	-0.6647
2007-04-01	16.8253
2007-07-01	-4.8748
2007-10-01	7.9057
2008-01-01	12.9775
2008-04-01	23.7701
2008-07-01	-4.1147
2008-10-01	-9.1583
2009-01-01	0.2975
2009-04-01	-11.2465
2009-07-01	-2.5017
2009-10-01	-3.5923
2010-01-01	17.9288
2010-04-01	7.7421
2010-07-01	1.9964
2010-10-01	-5.1118
2011-01-01	29.9257
2011-04-01	-3.6853
2011-07-01	-23.0849
2011-10-01	-10.1037
2012-01-01	3.5889
2012-04-01	-17.1529
2012-07-01	15.3113
2012-10-01	-7.9290
2013-01-01	6.7588
2013-04-01	1.0083
2013-07-01	-0.3759
2013-10-01	-10.1980
2014-01-01	12.5579
2014-04-01	-2.9606
2014-07-01	5.3895
2014-10-01	-9.7773
2015-01-01	-1.5089
2015-04-01	-5.0778