Quarter	Billions of US Dollars
1993-07-01	5.0112
1993-10-01	-0.3489
1994-01-01	-0.1570
1994-04-01	0.5956
1994-07-01	-1.3218
1994-10-01	-0.9508
1995-01-01	-0.4112
1995-04-01	0.6992
1995-07-01	0.2157
1995-10-01	-1.4487
1996-01-01	-0.2026
1996-04-01	0.2376
1996-07-01	-0.0705
1996-10-01	-0.0071
1997-01-01	0.9193
1997-04-01	2.0977
1997-07-01	1.6940
1997-10-01	-0.6797
1998-01-01	-0.8303
1998-04-01	1.0490
1998-07-01	2.0422
1998-10-01	4.8043
1999-01-01	3.8415
1999-04-01	3.0677
1999-07-01	2.7141
1999-10-01	1.6731
2000-01-01	1.7633
2000-04-01	7.4252
2000-07-01	1.9074
2000-10-01	7.7232
2001-01-01	0.3662
2001-04-01	-1.2872
2001-07-01	0.3625
2001-10-01	2.0805
2002-01-01	-4.6552
2002-04-01	-0.1460
2002-07-01	1.0001
2002-10-01	3.4300
2003-01-01	-2.4335
2003-04-01	-4.5158
2003-07-01	-1.3932
2003-10-01	6.6912
2004-01-01	3.2905
2004-04-01	1.2763
2004-07-01	-4.1736
2004-10-01	-2.9338
2005-01-01	1.0396
2005-04-01	-2.8604
2005-07-01	-8.1507
2005-10-01	2.0588
2006-01-01	1.9173
2006-04-01	8.2166
2006-07-01	-3.7488
2006-10-01	-1.9868
2007-01-01	8.1628
2007-04-01	5.7249
2007-07-01	1.2196
2007-10-01	2.3393
2008-01-01	12.5054
2008-04-01	0.8129
2008-07-01	12.8771
2008-10-01	4.7128
2009-01-01	1.4316
2009-04-01	-8.2682
2009-07-01	8.6613
2009-10-01	-9.8028
2010-01-01	4.8915
2010-04-01	-8.7591
2010-07-01	19.1542
2010-10-01	2.7170
2011-01-01	1.9908
2011-04-01	2.5532
2011-07-01	7.1330
2011-10-01	2.0519
2012-01-01	15.8510
2012-04-01	-6.5495
2012-07-01	-8.5706
2012-10-01	1.9567
2013-01-01	-3.8191
2013-04-01	1.5040
2013-07-01	-7.2921
2013-10-01	-19.9890
2014-01-01	-0.0596
2014-04-01	9.0580
2014-07-01	-9.7198
2014-10-01	-10.4995
2015-01-01	4.9035
2015-04-01	-4.4195