Quarter	Billions of US Dollars
1993-07-01	3.3766
1993-10-01	0.9626
1994-01-01	-0.4248
1994-04-01	1.4260
1994-07-01	0.9568
1994-10-01	-0.5160
1995-01-01	-0.5985
1995-04-01	0.2742
1995-07-01	1.4515
1995-10-01	4.0286
1996-01-01	-0.1588
1996-04-01	0.0793
1996-07-01	-1.7505
1996-10-01	-1.0369
1997-01-01	-0.4659
1997-04-01	-0.4790
1997-07-01	-0.9710
1997-10-01	2.8742
1998-01-01	0.0529
1998-04-01	-0.6540
1998-07-01	-0.2586
1998-10-01	0.3492
1999-01-01	2.9733
1999-04-01	-0.4954
1999-07-01	3.6230
1999-10-01	0.8192
2000-01-01	-1.5286
2000-04-01	5.2209
2000-07-01	-1.8308
2000-10-01	1.9588
2001-01-01	0.6136
2001-04-01	-2.7428
2001-07-01	1.2516
2001-10-01	3.5873
2002-01-01	-2.0902
2002-04-01	1.4273
2002-07-01	-1.3154
2002-10-01	-5.6422
2003-01-01	-3.7035
2003-04-01	0.7390
2003-07-01	0.3319
2003-10-01	1.3562
2004-01-01	3.5081
2004-04-01	1.1147
2004-07-01	-0.0982
2004-10-01	-1.4377
2005-01-01	-1.3720
2005-04-01	-0.4459
2005-07-01	0.4939
2005-10-01	0.1924
2006-01-01	-0.8345
2006-04-01	10.2412
2006-07-01	-6.7037
2006-10-01	4.9769
2007-01-01	8.6120
2007-04-01	3.0666
2007-07-01	7.5338
2007-10-01	5.4490
2008-01-01	7.8337
2008-04-01	11.1820
2008-07-01	2.8958
2008-10-01	-17.3098
2009-01-01	3.7389
2009-04-01	-1.8705
2009-07-01	0.4766
2009-10-01	-12.3253
2010-01-01	1.8452
2010-04-01	-3.5673
2010-07-01	18.6310
2010-10-01	-19.9462
2011-01-01	1.3672
2011-04-01	-1.6795
2011-07-01	-12.4917
2011-10-01	-6.8530
2012-01-01	2.5904
2012-04-01	-7.6544
2012-07-01	-0.2836
2012-10-01	3.6739
2013-01-01	1.7370
2013-04-01	-3.3222
2013-07-01	1.7204
2013-10-01	-8.7999
2014-01-01	2.2057
2014-04-01	-0.0771
2014-07-01	1.9749
2014-10-01	-2.1924
2015-01-01	-2.3845
2015-04-01	0.3916