Quarter	Billions of US Dollars
1993-07-01	4.0914
1993-10-01	7.1132
1994-01-01	4.5085
1994-04-01	2.8853
1994-07-01	2.0988
1994-10-01	1.3917
1995-01-01	-2.7956
1995-04-01	1.0159
1995-07-01	3.6023
1995-10-01	2.0832
1996-01-01	3.0862
1996-04-01	5.7944
1996-07-01	3.4931
1996-10-01	8.8576
1997-01-01	4.3751
1997-04-01	8.6222
1997-07-01	9.4271
1997-10-01	1.6790
1998-01-01	3.1850
1998-04-01	4.5544
1998-07-01	-0.9810
1998-10-01	-1.3067
1999-01-01	-0.5984
1999-04-01	2.6923
1999-07-01	-0.3260
1999-10-01	0.1771
2000-01-01	3.3717
2000-04-01	0.8332
2000-07-01	0.8090
2000-10-01	-2.6052
2001-01-01	1.2505
2001-04-01	1.4874
2001-07-01	1.0048
2001-10-01	-0.9593
2002-01-01	0.4005
2002-04-01	1.3899
2002-07-01	-1.7976
2002-10-01	2.3002
2003-01-01	1.9138
2003-04-01	0.4471
2003-07-01	1.7856
2003-10-01	2.7398
2004-01-01	4.3289
2004-04-01	1.0840
2004-07-01	0.5646
2004-10-01	1.0008
2005-01-01	3.3677
2005-04-01	0.4496
2005-07-01	7.1542
2005-10-01	5.5740
2006-01-01	5.4408
2006-04-01	1.8470
2006-07-01	5.7047
2006-10-01	10.8891
2007-01-01	3.7846
2007-04-01	19.0212
2007-07-01	1.6795
2007-10-01	7.4734
2008-01-01	0.1889
2008-04-01	2.0749
2008-07-01	4.8909
2008-10-01	-5.0264
2009-01-01	-3.3702
2009-04-01	7.8218
2009-07-01	18.9332
2009-10-01	18.5163
2010-01-01	8.4607
2010-04-01	15.2485
2010-07-01	7.5771
2010-10-01	12.5413
2011-01-01	16.7597
2011-04-01	19.6990
2011-07-01	4.8127
2011-10-01	22.9412
2012-01-01	15.5090
2012-04-01	13.4748
2012-07-01	19.0581
2012-10-01	22.0944
2013-01-01	21.6122
2013-04-01	27.9980
2013-07-01	16.6265
2013-10-01	22.4749
2014-01-01	7.7484
2014-04-01	23.1799
2014-07-01	16.0178
2014-10-01	20.7930
2015-01-01	7.7204
2015-04-01	24.4364