Quarter	Billions of US Dollars
1993-07-01	-13.2695
1993-10-01	-4.5368
1994-01-01	3.4678
1994-04-01	-4.0818
1994-07-01	-7.0465
1994-10-01	-6.8569
1995-01-01	-4.7620
1995-04-01	-4.2441
1995-07-01	-4.3857
1995-10-01	2.0257
1996-01-01	3.2230
1996-04-01	3.4431
1996-07-01	0.8464
1996-10-01	0.0144
1997-01-01	1.2638
1997-04-01	2.8067
1997-07-01	0.4839
1997-10-01	-0.4269
1998-01-01	-0.4808
1998-04-01	2.2272
1998-07-01	3.7277
1998-10-01	-2.6445
1999-01-01	-0.8030
1999-04-01	2.5731
1999-07-01	1.4439
1999-10-01	-0.7101
2000-01-01	-1.5108
2000-04-01	-0.3953
2000-07-01	0.8983
2000-10-01	4.1682
2001-01-01	2.2320
2001-04-01	3.2997
2001-07-01	3.7991
2001-10-01	0.5257
2002-01-01	1.5331
2002-04-01	2.2858
2002-07-01	-1.2963
2002-10-01	-0.5429
2003-01-01	1.6552
2003-04-01	-5.0217
2003-07-01	2.4749
2003-10-01	3.3619
2004-01-01	1.4303
2004-04-01	1.8595
2004-07-01	-3.0863
2004-10-01	2.2662
2005-01-01	-0.4071
2005-04-01	-0.2214
2005-07-01	-2.4935
2005-10-01	-2.4575
2006-01-01	4.2143
2006-04-01	0.9663
2006-07-01	-0.2488
2006-10-01	1.5776
2007-01-01	1.4792
2007-04-01	4.1151
2007-07-01	0.9460
2007-10-01	6.2852
2008-01-01	-1.7035
2008-04-01	1.3072
2008-07-01	0.9585
2008-10-01	-3.6582
2009-01-01	-1.0261
2009-04-01	6.5622
2009-07-01	3.3244
2009-10-01	3.5498
2010-01-01	5.1426
2010-04-01	5.5256
2010-07-01	8.5376
2010-10-01	6.1335
2011-01-01	6.1511
2011-04-01	0.2196
2011-07-01	1.0308
2011-10-01	-1.2928
2012-01-01	3.3312
2012-04-01	-5.3032
2012-07-01	2.9323
2012-10-01	-4.1400
2013-01-01	6.9466
2013-04-01	6.3800
2013-07-01	3.4640
2013-10-01	19.0401
2014-01-01	9.6001
2014-04-01	9.9330
2014-07-01	12.1993
2014-10-01	2.8791
2015-01-01	2.5247
2015-04-01	8.2604