Quarter	Billions of US Dollars
1993-07-01	0.6768
1993-10-01	0.0245
1994-01-01	0.4186
1994-04-01	0.5127
1994-07-01	-0.1569
1994-10-01	-0.3930
1995-01-01	0.5667
1995-04-01	0.1608
1995-07-01	0.0311
1995-10-01	-0.5146
1996-01-01	0.8701
1996-04-01	0.2646
1996-07-01	1.6130
1996-10-01	-0.4670
1997-01-01	1.1940
1997-04-01	3.0581
1997-07-01	-0.5327
1997-10-01	-1.2301
1998-01-01	-0.2660
1998-04-01	-0.2654
1998-07-01	-0.1351
1998-10-01	-0.1219
1999-01-01	0.8052
1999-04-01	-0.5247
1999-07-01	1.3192
1999-10-01	0.5422
2000-01-01	0.4642
2000-04-01	1.2900
2000-07-01	-0.7730
2000-10-01	1.6654
2001-01-01	-0.7124
2001-04-01	3.0410
2001-07-01	-3.4177
2001-10-01	1.1944
2002-01-01	-1.0845
2002-04-01	-0.1986
2002-07-01	-0.1714
2002-10-01	0.7118
2003-01-01	1.1470
2003-04-01	-0.4369
2003-07-01	-1.2677
2003-10-01	2.0119
2004-01-01	3.9594
2004-04-01	-2.5152
2004-07-01	-0.6850
2004-10-01	0.8474
2005-01-01	2.0368
2005-04-01	0.5082
2005-07-01	-0.3559
2005-10-01	0.2051
2006-01-01	1.5962
2006-04-01	3.8715
2006-07-01	2.3176
2006-10-01	2.6477
2007-01-01	4.6389
2007-04-01	-5.1839
2007-07-01	9.4654
2007-10-01	-6.3770
2008-01-01	10.1071
2008-04-01	3.0542
2008-07-01	-9.7865
2008-10-01	-13.8763
2009-01-01	-0.1741
2009-04-01	-0.2196
2009-07-01	-1.2862
2009-10-01	-4.3120
2010-01-01	-1.3642
2010-04-01	0.8264
2010-07-01	-2.4051
2010-10-01	1.5174
2011-01-01	1.5224
2011-04-01	1.8930
2011-07-01	2.3903
2011-10-01	-1.2472
2012-01-01	0.2294
2012-04-01	-2.7631
2012-07-01	0.5431
2012-10-01	-3.2799
2013-01-01	1.6633
2013-04-01	5.1537
2013-07-01	-2.9557
2013-10-01	1.8096
2014-01-01	3.6474
2014-04-01	5.8282
2014-07-01	7.2613
2014-10-01	1.0134
2015-01-01	1.7839
2015-04-01	-0.6381