Quarter	Billions of US Dollars
1993-07-01	14.0075
1993-10-01	-0.7029
1994-01-01	0.6091
1994-04-01	-2.7591
1994-07-01	-2.4422
1994-10-01	-0.6624
1995-01-01	0.4766
1995-04-01	-0.1739
1995-07-01	1.2524
1995-10-01	-0.4070
1996-01-01	-1.1303
1996-04-01	-0.6514
1996-07-01	0.6815
1996-10-01	0.2982
1997-01-01	0.3927
1997-04-01	0.3578
1997-07-01	0.1464
1997-10-01	-2.4921
1998-01-01	1.8616
1998-04-01	-2.5637
1998-07-01	1.3571
1998-10-01	0.0533
1999-01-01	1.1471
1999-04-01	-1.9082
1999-07-01	1.8467
1999-10-01	0.7654
2000-01-01	2.8028
2000-04-01	-2.0393
2000-07-01	2.2866
2000-10-01	2.7636
2001-01-01	-2.7190
2001-04-01	-1.1100
2001-07-01	-0.1088
2001-10-01	-2.8365
2002-01-01	2.6297
2002-04-01	-1.4435
2002-07-01	2.6278
2002-10-01	1.0894
2003-01-01	0.6141
2003-04-01	1.6542
2003-07-01	0.9368
2003-10-01	4.2530
2004-01-01	0.6103
2004-04-01	-3.6298
2004-07-01	4.1287
2004-10-01	0.7218
2005-01-01	-2.3927
2005-04-01	5.6796
2005-07-01	-3.6069
2005-10-01	3.6117
2006-01-01	5.1800
2006-04-01	5.6977
2006-07-01	2.0515
2006-10-01	0.2391
2007-01-01	0.8312
2007-04-01	7.8079
2007-07-01	0.3812
2007-10-01	-5.7080
2008-01-01	17.4229
2008-04-01	-7.0541
2008-07-01	-9.6599
2008-10-01	-22.3590
2009-01-01	-0.0937
2009-04-01	-0.0956
2009-07-01	-0.1304
2009-10-01	-0.3977
2010-01-01	-4.7099
2010-04-01	2.9173
2010-07-01	-3.7610
2010-10-01	8.6548
2011-01-01	-0.8885
2011-04-01	4.7203
2011-07-01	-1.3382
2011-10-01	-0.9689
2012-01-01	-4.2106
2012-04-01	2.7696
2012-07-01	1.1240
2012-10-01	6.1052
2013-01-01	-4.9005
2013-04-01	-4.9878
2013-07-01	3.5319
2013-10-01	3.9926
2014-01-01	-4.6434
2014-04-01	-0.5280
2014-07-01	-1.5390
2014-10-01	-2.2850
2015-01-01	-0.9827
2015-04-01	-2.6090