Quarter	Billions of US Dollars
1993-07-01	-1.8069
1993-10-01	4.2638
1994-01-01	0.5482
1994-04-01	1.6397
1994-07-01	0.1717
1994-10-01	-0.1231
1995-01-01	-2.4025
1995-04-01	0.1204
1995-07-01	0.8657
1995-10-01	2.6823
1996-01-01	3.7497
1996-04-01	10.1731
1996-07-01	3.5624
1996-10-01	5.8735
1997-01-01	3.9033
1997-04-01	7.4714
1997-07-01	3.2559
1997-10-01	2.2449
1998-01-01	4.4696
1998-04-01	7.8645
1998-07-01	8.9280
1998-10-01	4.9189
1999-01-01	2.6610
1999-04-01	8.0221
1999-07-01	7.6907
1999-10-01	6.0508
2000-01-01	2.3923
2000-04-01	3.3311
2000-07-01	4.5394
2000-10-01	9.6787
2001-01-01	8.3090
2001-04-01	6.5103
2001-07-01	6.5945
2001-10-01	11.1181
2002-01-01	2.0143
2002-04-01	10.6750
2002-07-01	-2.4268
2002-10-01	-1.5965
2003-01-01	-0.3246
2003-04-01	-0.7053
2003-07-01	4.2500
2003-10-01	11.5162
2004-01-01	-1.9802
2004-04-01	8.5154
2004-07-01	-4.9755
2004-10-01	-4.8981
2005-01-01	-0.1099
2005-04-01	-3.9221
2005-07-01	-7.9677
2005-10-01	-3.3564
2006-01-01	4.7027
2006-04-01	3.3494
2006-07-01	-4.0510
2006-10-01	6.9700
2007-01-01	-0.0287
2007-04-01	12.7812
2007-07-01	7.6473
2007-10-01	7.8798
2008-01-01	-2.8696
2008-04-01	11.4219
2008-07-01	-7.6236
2008-10-01	-4.0589
2009-01-01	-6.2537
2009-04-01	1.2361
2009-07-01	3.3091
2009-10-01	7.0419
2010-01-01	2.5676
2010-04-01	3.6318
2010-07-01	8.4406
2010-10-01	3.6437
2011-01-01	3.3990
2011-04-01	-6.4448
2011-07-01	-3.6407
2011-10-01	-2.1316
2012-01-01	2.5454
2012-04-01	-9.3047
2012-07-01	3.6435
2012-10-01	-1.5516
2013-01-01	6.5657
2013-04-01	10.5568
2013-07-01	9.1279
2013-10-01	37.1406
2014-01-01	13.8986
2014-04-01	15.0389
2014-07-01	12.9756
2014-10-01	3.3147
2015-01-01	2.6344
2015-04-01	16.1480