Quarter	US Dollars, sum over component sub-periods
1980-01-01	0.00000000
1980-04-01	0.00000000
1980-07-01	0.00000000
1980-10-01	0.00000000
1981-01-01	0.00000000
1981-04-01	0.00000000
1981-07-01	0.00000000
1981-10-01	0.00000000
1982-01-01	0.00000000
1982-04-01	0.00000000
1982-07-01	0.00000000
1982-10-01	0.00000000
1983-01-01	0.00000000
1983-04-01	0.00000000
1983-07-01	0.00000000
1983-10-01	0.00000000
1984-01-01	0.00000000
1984-04-01	0.00000000
1984-07-01	0.00000000
1984-10-01	0.00000000
1985-01-01	0.00000000
1985-04-01	0.00000000
1985-07-01	0.00000000
1985-10-01	0.00000000
1986-01-01	0.00000000
1986-04-01	0.00000000
1986-07-01	0.00000000
1986-10-01	0.00000000
1987-01-01	0.00000000
1987-04-01	0.00000000
1987-07-01	0.00000000
1987-10-01	0.00000000
1988-01-01	0.00000000
1988-04-01	0.00000000
1988-07-01	0.00000000
1988-10-01	0.00000000
1989-01-01	0.00000000
1989-04-01	0.00000000
1989-07-01	0.00000000
1989-10-01	0.00000000
1990-01-01	0.00000000
1990-04-01	0.00000000
1990-07-01	0.00000000
1990-10-01	0.00000000
1991-01-01	0.00000000
1991-04-01	0.00000000
1991-07-01	0.00000000
1991-10-01	0.00000000
1992-01-01	0.00000000
1992-04-01	0.00000000
1992-07-01	0.00000000
1992-10-01	0.00000000
1993-01-01	0.00000000
1993-04-01	0.00000000
1993-07-01	0.00000000
1993-10-01	0.00000000
1994-01-01	0.00000000
1994-04-01	0.00000000
1994-07-01	0.00000000
1994-10-01	0.00000000
1995-01-01	0.00000000
1995-04-01	0.00000000
1995-07-01	0.00000000
1995-10-01	0.00000000
1996-01-01	0.00000000
1996-04-01	0.00000000
1996-07-01	0.00000000
1996-10-01	0.00000000
1997-01-01	0.00000000
1997-04-01	0.00000000
1997-07-01	0.00000000
1997-10-01	0.00000000
1998-01-01	-14100000.00000000
1998-04-01	429600000.00000000
1998-07-01	20900000.00000000
1998-10-01	5300000.00000000
1999-01-01	-10700000.00000000
1999-04-01	-9400000.00000000
1999-07-01	7200000.00000000
1999-10-01	69100000.00000000
2000-01-01	-6000000.00000000
2000-04-01	4000000.00000000
2000-07-01	11000000.00000000
2000-10-01	29400000.00000000
2001-01-01	-3800000.00000000
2001-04-01	2100000.00000000
2001-07-01	-61400000.00000000
2001-10-01	-1000000.00000000
2002-01-01	-1900000.00000000
2002-04-01	-1800000.00000000
2002-07-01	-1900000.00000000
2002-10-01	-3800000.00000000
2003-01-01	2100000.00000000
2003-04-01	-29500000.00000000
2003-07-01	-1400000.00000000
2003-10-01	-19100000.00000000
2004-01-01	9200000.00000000
2004-04-01	4000000.00000000
2004-07-01	-1400000.00000000
2004-10-01	-2100000.00000000
2005-01-01	-1300000.00000000
2005-04-01	-4400000.00000000
2005-07-01	-21400000.00000000
2005-10-01	26500000.00000000
2006-01-01	-50200000.00000000
2006-04-01	-7500000.00000000
2006-07-01	9100000.00000000
2006-10-01	-20400000.00000000
2007-01-01	-77600000.00000000
2007-04-01	35100000.00000000
2007-07-01	36700000.00000000
2007-10-01	11500000.00000000
2008-01-01	-3200000.00000000
2008-04-01	14200000.00000000
2008-07-01	23400000.00000000
2008-10-01	-8000000.00000000
2009-01-01	-12500000.00000000
2009-04-01	-6900000.00000000
2009-07-01	-24200000.00000000
2009-10-01	-26000000.00000000
2010-01-01	-33700000.00000000
2010-04-01	-28200000.00000000
2010-07-01	-5900000.00000000
2010-10-01	4600000.00000000
2011-01-01	-30000000.00000000
2011-04-01	-9700000.00000000
2011-07-01	-5400000.00000000
2011-10-01	-66900000.00000001
2012-01-01	-19200000.00000000
2012-04-01	-6700000.00000000
2012-07-01	-9000000.00000000
2012-10-01	-6800000.00000000
2013-01-01	-2700000.00000000
2013-04-01	-27500000.00000000
2013-07-01	12800000.00000000
2013-10-01	-9600000.00000000
2014-01-01	-2100000.00000000
2014-04-01	-4300000.00000000
2014-07-01	3600000.00000000
2014-10-01	-6100000.00000000
2015-01-01	-22000000.00000000
2015-04-01	-25600000.00000000
2015-07-01	-26200000.00000000
2015-10-01	13600000.00000000
2016-01-01	-8100000.00000000
2016-04-01	-7000000.00000000
2016-07-01	13900000.00000000
2016-10-01	-45000000.00000000
2017-01-01	36400000.00000000
2017-04-01	-60300000.00000000
2017-07-01	-7700000.00000000
2017-10-01	300000.00000000
2018-01-01	-21300000.00000000
2018-04-01	-70700000.00000000
2018-07-01	61500000.00000000