Quarter	US Dollars, sum over component sub-periods
1980-01-01	-2080400000.00000000000
1980-04-01	-1602300000.00000000000
1980-07-01	-1430100000.00000000000
1980-10-01	-1164700000.00000000000
1981-01-01	-2072600000.00000000000
1981-04-01	-1133800000.00000000000
1981-07-01	-1156600000.00000000000
1981-10-01	-582200000.00000000000
1982-01-01	-895700000.00000000000
1982-04-01	-931200000.00000000000
1982-07-01	-749700000.00000000000
1982-10-01	-1945400000.00000000000
1983-01-01	-1294200000.00000000000
1983-04-01	-755200000.00000000000
1983-07-01	-989100000.00000000000
1983-10-01	-584400000.00000000000
1984-01-01	-505300000.00000000000
1984-04-01	-805900000.00000000000
1984-07-01	-302800000.00000000000
1984-10-01	5800000.00000000000
1985-01-01	-1549500000.00000000000
1985-04-01	-1068800000.00000000000
1985-07-01	-464300000.00000000000
1985-10-01	-819500000.00000000000
1986-01-01	-224700000.00000000000
1986-04-01	501800000.00000000000
1986-07-01	1455500000.00000000000
1986-10-01	1372800000.00000000000
1987-01-01	2193000000.00000000000
1987-04-01	2338700000.00000000000
1987-07-01	3105900000.00000000000
1987-10-01	3677700000.00000000000
1988-01-01	3201100000.00000000000
1988-04-01	3139900000.00000000000
1988-07-01	3583100000.00000000000
1988-10-01	3853300000.00000000000
1989-01-01	2421200000.00000000000
1989-04-01	1780100000.00000000000
1989-07-01	793500000.00000000000
1989-10-01	591300000.00000000000
1990-01-01	-975400000.00000000000
1990-04-01	-225500000.00000000000
1990-07-01	246600000.00000000000
1990-10-01	-2574900000.00000000000
1991-01-01	-3598000000.00000000000
1991-04-01	-1864800000.00000000000
1991-07-01	-1447900000.00000000000
1991-10-01	-296100000.00000000000
1992-01-01	-1340000000.00000000000
1992-04-01	141000000.00000000000
1992-07-01	240600000.00000000000
1992-10-01	-625400000.00000000000
1993-01-01	-63300000.00000000000
1993-04-01	80900000.00000000000
1993-07-01	343400000.00000000000
1993-10-01	111500000.00000000000
1994-01-01	-1954500000.00000000000
1994-04-01	-1087900000.00000000000
1994-07-01	-2376100000.00000000000
1994-10-01	-879000000.00000000000
1995-01-01	-3842800000.00000000000
1995-04-01	-3564700000.00000000000
1995-07-01	-2509400000.00000000000
1995-10-01	-1600100000.00000000000
1996-01-01	-4985600000.00000000000
1996-04-01	-6733000000.00000000000
1996-07-01	-6190400000.00000000000
1996-10-01	-5558900000.00000000000
1997-01-01	-8809900000.00000000000
1997-04-01	-3080300000.00000000000
1997-07-01	-3697300000.00000000000
1997-10-01	-2197800000.00000000000
1998-01-01	9947300000.00000000000
1998-04-01	8774500000.00000000000
1998-07-01	8091100000.00000000000
1998-10-01	7156500000.00000000000
1999-01-01	5737200000.00000000000
1999-04-01	4460300000.00000000000
1999-07-01	5445000000.00000000000
1999-10-01	2728300000.00000000000
2000-01-01	-491800000.00000000000
2000-04-01	2005200000.00000000000
2000-07-01	3433300000.00000000000
2000-10-01	4673000000.00000000000
2001-01-01	3115300000.00000000000
2001-04-01	1978600000.00000000000
2001-07-01	1923400000.00000000000
2001-10-01	1632500000.00000000000
2002-01-01	400000.00000005995
2002-04-01	1225300000.00000000000
2002-07-01	2444200000.00000000000
2002-10-01	2561000000.00000000000
2003-01-01	-168400000.00000000000
2003-04-01	3325900000.00000000000
2003-07-01	6460100000.00000000000
2003-10-01	6980300000.00000000000
2004-01-01	3900900000.00000000000
2004-04-01	9585800000.00000000000
2004-07-01	10463300000.00000000000
2004-10-01	10382300000.00000000000
2005-01-01	6016900000.00000000000
2005-04-01	864700000.00000000000
2005-07-01	4185300000.00000000000
2005-10-01	7703800000.00000000000
2006-01-01	-1295100000.00000000000
2006-04-01	1466200000.00000000000
2006-07-01	4723700000.00000000000
2006-10-01	7650700000.00000000000
2007-01-01	-949000000.00000000000
2007-04-01	931500000.00000000000
2007-07-01	10965200000.00000000000
2007-10-01	6546200000.00000000000
2008-01-01	-5143100000.00000000000
2008-04-01	-5109700000.00000000000
2008-07-01	-3011200000.00000000000
2008-10-01	6672400000.00000000000
2009-01-01	4968100000.00000000000
2009-04-01	8286600000.00000000000
2009-07-01	3988300000.00000000000
2009-10-01	9922900000.00000000000
2010-01-01	588100000.00000000000
2010-04-01	7151800000.00000000000
2010-07-01	8815800000.00000000000
2010-10-01	6634300000.00000000000
2011-01-01	-3231100000.00000000000
2011-04-01	8500000.00000000000
2011-07-01	11957300000.00000000000
2011-10-01	15581100000.00000000000
2012-01-01	4564400000.00000000000
2012-04-01	4278700000.00000000000
2012-07-01	18096100000.00000000000
2012-10-01	24643200000.00000000000
2013-01-01	11448700000.00000000000
2013-04-01	19645600000.00000000000
2013-07-01	22675500000.00000000000
2013-10-01	26334800000.00000000000
2014-01-01	15120700000.00000000000
2014-04-01	24650200000.00000000000
2014-07-01	21230400000.00000000000
2014-10-01	28332700000.00000000000
2015-01-01	22974300000.00000000000
2015-04-01	25857100000.00000000000
2015-07-01	29806100000.00000000000
2015-10-01	27661700000.00000000000
2016-01-01	29486000000.00000000000
2016-04-01	23327500000.00000000000
2016-07-01	24822100000.00000000000
2016-10-01	24931200000.00000000000
2017-01-01	19741100000.00000000000
2017-04-01	13043400000.00000000000
2017-07-01	30844500000.00000000000
2017-10-01	23471400000.00000000000
2018-01-01	12545000000.00000000000
2018-04-01	11394200000.00000000000
2018-07-01	27462000000.00000000000