Quarter	US Dollars, sum over component sub-periods
1980-01-01	0
1980-04-01	0
1980-07-01	0
1980-10-01	0
1981-01-01	0
1981-04-01	0
1981-07-01	0
1981-10-01	0
1982-01-01	0
1982-04-01	0
1982-07-01	0
1982-10-01	0
1983-01-01	0
1983-04-01	0
1983-07-01	0
1983-10-01	0
1984-01-01	0
1984-04-01	0
1984-07-01	0
1984-10-01	0
1985-01-01	0
1985-04-01	0
1985-07-01	0
1985-10-01	0
1986-01-01	0
1986-04-01	0
1986-07-01	0
1986-10-01	0
1987-01-01	0
1987-04-01	0
1987-07-01	0
1987-10-01	0
1988-01-01	0
1988-04-01	0
1988-07-01	0
1988-10-01	0
1989-01-01	0
1989-04-01	0
1989-07-01	0
1989-10-01	0
1990-01-01	0
1990-04-01	0
1990-07-01	0
1990-10-01	0
1991-01-01	0
1991-04-01	0
1991-07-01	0
1991-10-01	0
1992-01-01	0
1992-04-01	0
1992-07-01	0
1992-10-01	0
1993-01-01	0
1993-04-01	0
1993-07-01	0
1993-10-01	0
1994-01-01	0
1994-04-01	0
1994-07-01	0
1994-10-01	0
1995-01-01	0
1995-04-01	0
1995-07-01	0
1995-10-01	0
1996-01-01	0
1996-04-01	0
1996-07-01	0
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	1300000
1998-04-01	0
1998-07-01	500000
1998-10-01	200000
1999-01-01	800000
1999-04-01	-1200000
1999-07-01	1500000
1999-10-01	69800000
2000-01-01	2200000
2000-04-01	6600000
2000-07-01	9200000
2000-10-01	31800000
2001-01-01	-1000000
2001-04-01	0
2001-07-01	200000
2001-10-01	100000
2002-01-01	700000
2002-04-01	2300000
2002-07-01	-300000
2002-10-01	0
2003-01-01	6400000
2003-04-01	-400000
2003-07-01	500000
2003-10-01	300000
2004-01-01	6100000
2004-04-01	300000
2004-07-01	100000
2004-10-01	0
2005-01-01	600000
2005-04-01	-100000
2005-07-01	-200000
2005-10-01	-400000
2006-01-01	1800000
2006-04-01	1000000
2006-07-01	200000
2006-10-01	-1900000
2007-01-01	-900000
2007-04-01	8900000
2007-07-01	11800000
2007-10-01	8000000
2008-01-01	6700000
2008-04-01	16200000
2008-07-01	2500000
2008-10-01	1200000
2009-01-01	500000
2009-04-01	-100000
2009-07-01	500000
2009-10-01	-1300000
2010-01-01	200000
2010-04-01	-100000
2010-07-01	10700000
2010-10-01	0
2011-01-01	100000
2011-04-01	-300000
2011-07-01	-100000
2011-10-01	-100000
2012-01-01	100000
2012-04-01	400000
2012-07-01	-300000
2012-10-01	-4300000
2013-01-01	2500000
2013-04-01	2200000
2013-07-01	1000000
2013-10-01	-2800000
2014-01-01	-1200000
2014-04-01	-1400000
2014-07-01	2000000
2014-10-01	1600000
2015-01-01	800000
2015-04-01	2100000
2015-07-01	4700000
2015-10-01	18100000
2016-01-01	2600000
2016-04-01	1700000
2016-07-01	2700000
2016-10-01	1200000
2017-01-01	44400000
2017-04-01	13200000
2017-07-01	20300000
2017-10-01	-17600000
2018-01-01	-2100000
2018-04-01	-5900000
2018-07-01	-4400000