Quarter	US Dollars, sum over component sub-periods
1980-01-01	0.0000000000
1980-04-01	0.0000000000
1980-07-01	0.0000000000
1980-10-01	0.0000000000
1981-01-01	0.0000000000
1981-04-01	0.0000000000
1981-07-01	0.0000000000
1981-10-01	0.0000000000
1982-01-01	0.0000000000
1982-04-01	0.0000000000
1982-07-01	0.0000000000
1982-10-01	0.0000000000
1983-01-01	0.0000000000
1983-04-01	0.0000000000
1983-07-01	0.0000000000
1983-10-01	0.0000000000
1984-01-01	0.0000000000
1984-04-01	0.0000000000
1984-07-01	0.0000000000
1984-10-01	0.0000000000
1985-01-01	0.0000000000
1985-04-01	0.0000000000
1985-07-01	0.0000000000
1985-10-01	0.0000000000
1986-01-01	0.0000000000
1986-04-01	0.0000000000
1986-07-01	0.0000000000
1986-10-01	0.0000000000
1987-01-01	0.0000000000
1987-04-01	0.0000000000
1987-07-01	0.0000000000
1987-10-01	0.0000000000
1988-01-01	0.0000000000
1988-04-01	0.0000000000
1988-07-01	0.0000000000
1988-10-01	0.0000000000
1989-01-01	0.0000000000
1989-04-01	0.0000000000
1989-07-01	0.0000000000
1989-10-01	0.0000000000
1990-01-01	0.0000000000
1990-04-01	0.0000000000
1990-07-01	0.0000000000
1990-10-01	0.0000000000
1991-01-01	0.0000000000
1991-04-01	0.0000000000
1991-07-01	0.0000000000
1991-10-01	0.0000000000
1992-01-01	0.0000000000
1992-04-01	0.0000000000
1992-07-01	0.0000000000
1992-10-01	0.0000000000
1993-01-01	0.0000000000
1993-04-01	0.0000000000
1993-07-01	0.0000000000
1993-10-01	0.0000000000
1994-01-01	0.0000000000
1994-04-01	0.0000000000
1994-07-01	0.0000000000
1994-10-01	0.0000000000
1995-01-01	0.0000000000
1995-04-01	0.0000000000
1995-07-01	0.0000000000
1995-10-01	0.0000000000
1996-01-01	0.0000000000
1996-04-01	0.0000000000
1996-07-01	0.0000000000
1996-10-01	0.0000000000
1997-01-01	0.0000000000
1997-04-01	0.0000000000
1997-07-01	0.0000000000
1997-10-01	0.0000000000
1998-01-01	-15400000.0000000000
1998-04-01	429600000.0000000000
1998-07-01	20400000.0000000000
1998-10-01	5100000.0000000000
1999-01-01	-11500000.0000000000
1999-04-01	-8199999.9999999990
1999-07-01	5700000.0000000000
1999-10-01	-700000.0000000000
2000-01-01	-8199999.9999999990
2000-04-01	-2600000.0000000000
2000-07-01	1800000.0000000000
2000-10-01	-2400000.0000000000
2001-01-01	-2800000.0000000000
2001-04-01	2100000.0000000000
2001-07-01	-61600000.0000000000
2001-10-01	-1100000.0000000000
2002-01-01	-2600000.0000000000
2002-04-01	-4099999.9999999995
2002-07-01	-1600000.0000000000
2002-10-01	-3800000.0000000000
2003-01-01	-4300000.0000000000
2003-04-01	-29100000.0000000000
2003-07-01	-1900000.0000000000
2003-10-01	-19400000.0000000000
2004-01-01	3100000.0000000000
2004-04-01	3700000.0000000000
2004-07-01	-1500000.0000000000
2004-10-01	-2100000.0000000000
2005-01-01	-1900000.0000000000
2005-04-01	-4300000.0000000000
2005-07-01	-21200000.0000000000
2005-10-01	26900000.0000000000
2006-01-01	-52000000.0000000000
2006-04-01	-8500000.0000000000
2006-07-01	8900000.0000000000
2006-10-01	-18500000.0000000000
2007-01-01	-76700000.0000000000
2007-04-01	26200000.0000000000
2007-07-01	24900000.0000000000
2007-10-01	3500000.0000000000
2008-01-01	-9900000.0000000000
2008-04-01	-2000000.0000000000
2008-07-01	20900000.0000000000
2008-10-01	-9200000.0000000000
2009-01-01	-13000000.0000000000
2009-04-01	-6800000.0000000000
2009-07-01	-24700000.0000000000
2009-10-01	-24700000.0000000000
2010-01-01	-33900000.0000000000
2010-04-01	-28100000.0000000000
2010-07-01	-16600000.0000000020
2010-10-01	4600000.0000000000
2011-01-01	-30100000.0000000000
2011-04-01	-9400000.0000000000
2011-07-01	-5300000.0000000000
2011-10-01	-66800000.0000000000
2012-01-01	-19300000.0000000000
2012-04-01	-7100000.0000000000
2012-07-01	-8700000.0000000000
2012-10-01	-2500000.0000000000
2013-01-01	-5200000.0000000000
2013-04-01	-29700000.0000000000
2013-07-01	11800000.0000000000
2013-10-01	-6800000.0000000000
2014-01-01	-900000.0000000000
2014-04-01	-2900000.0000000000
2014-07-01	1600000.0000000000
2014-10-01	-7700000.0000000000
2015-01-01	-22800000.0000000000
2015-04-01	-27700000.0000000000
2015-07-01	-30900000.0000000000
2015-10-01	-4500000.0000000000
2016-01-01	-10700000.0000000000
2016-04-01	-8700000.0000000000
2016-07-01	11200000.0000000000
2016-10-01	-46200000.0000000000
2017-01-01	-8000000.0000000000
2017-04-01	-73500000.0000000000
2017-07-01	-28000000.0000000000
2017-10-01	17900000.0000000000
2018-01-01	-19200000.0000000000
2018-04-01	-64800000.0000000000
2018-07-01	65900000.0000000100