Quarter	Billions of US Dollars
1993-07-01	0.34740
1993-10-01	0.14000
1994-07-01	0.15398
1994-10-01	-0.05000
1995-01-01	0.18936
1995-04-01	-0.14325
1995-10-01	0.15000
1996-10-01	0.00007
1997-01-01	0.12000
1997-07-01	-0.09817
1997-10-01	-0.27947
1998-01-01	-0.21704
1998-04-01	0.53162
1998-07-01	0.21279
1999-01-01	0.76540
1999-04-01	-0.06696
1999-07-01	-0.05023
1999-10-01	-0.19132
2000-01-01	0.10881
2000-07-01	0.07842
2000-10-01	0.69672
2001-04-01	0.12724
2001-10-01	-0.09889
2002-01-01	0.17405
2002-07-01	0.19613
2002-10-01	0.27173
2003-04-01	0.46281
2003-07-01	1.14985
2003-10-01	0.52986
2004-01-01	-0.21956
2004-04-01	0.01530
2004-07-01	0.55732
2004-10-01	0.51299
2005-01-01	0.51031
2005-04-01	0.15000
2005-07-01	-0.07641
2005-10-01	0.18189
2006-04-01	0.19100
2006-10-01	1.94580
2007-01-01	-0.51311
2007-04-01	0.18438
2007-07-01	-0.17279
2007-10-01	-0.17928
2008-01-01	3.34577
2008-04-01	-0.48715
2009-01-01	-0.65090
2009-04-01	-0.34550
2009-07-01	-0.16934
2009-10-01	-0.42649
2010-01-01	0.11052
2010-04-01	0.24240
2010-10-01	-1.30405
2011-01-01	-1.85079
2011-04-01	1.21962
2011-07-01	-0.55807
2011-10-01	-0.12721
2012-01-01	-0.15861
2012-04-01	0.28170
2012-07-01	-0.48544
2012-10-01	0.02937
2013-01-01	0.54032
2013-04-01	-0.50468
2013-07-01	-0.67140
2013-10-01	0.19156
2014-01-01	0.85366
2014-04-01	0.59227
2014-07-01	0.32401
2014-10-01	-0.75333
2015-01-01	-0.54469
2015-04-01	-0.10774