Quarter	US Dollars, sum over component sub-periods
1980-01-01	-130699999.99999999
1980-04-01	-158000000.00000000
1980-07-01	1194100000.00000000
1980-10-01	-42100000.00000000
1981-01-01	-539200000.00000000
1981-04-01	173900000.00000000
1981-07-01	-480600000.00000000
1981-10-01	1164800000.00000000
1982-01-01	-593500000.00000000
1982-04-01	51900000.00000000
1982-07-01	-203200000.00000000
1982-10-01	837400000.00000000
1983-01-01	-982800000.00000000
1983-04-01	16500000.00000000
1983-07-01	295500000.00000000
1983-10-01	596800000.00000000
1984-01-01	-546700000.00000000
1984-04-01	427900000.00000000
1984-07-01	224800000.00000000
1984-10-01	769100000.00000000
1985-01-01	-909400000.00000000
1985-04-01	-59600000.00000000
1985-07-01	448700000.00000000
1985-10-01	479400000.00000000
1986-01-01	-507400000.00000000
1986-04-01	137500000.00000000
1986-07-01	500800000.00000000
1986-10-01	-176700000.00000000
1987-01-01	-195800000.00000000
1987-04-01	216600000.00000000
1987-07-01	411600000.00000000
1987-10-01	453800000.00000000
1988-01-01	3400200000.00000000
1988-04-01	2412000000.00000000
1988-07-01	2875800000.00000000
1988-10-01	169300000.00000000
1989-01-01	2157900000.00000000
1989-04-01	2161600000.00000000
1989-07-01	935400000.00000000
1989-10-01	-2064500000.00000000
1990-01-01	-1194600000.00000000
1990-04-01	573300000.00000000
1990-07-01	776400000.00000000
1990-10-01	-1340800000.00000000
1991-01-01	-1248700000.00000000
1991-04-01	539200000.00000000
1991-07-01	147500000.00000000
1991-10-01	-581200000.00000000
1992-01-01	1124900000.00000000
1992-04-01	-343800000.00000000
1992-07-01	518299999.99999994
1992-10-01	2409000000.00000000
1993-01-01	1274500000.00000000
1993-04-01	94000000.00000000
1993-07-01	685900000.00000000
1993-10-01	953300000.00000000
1994-01-01	125300000.00000000
1994-04-01	607000000.00000000
1994-07-01	526799999.99999994
1994-10-01	3387100000.00000000
1995-01-01	6200000.00000000
1995-04-01	1471200000.00000000
1995-07-01	3768600000.00000000
1995-10-01	1798900000.00000000
1996-01-01	1085400000.00000000
1996-04-01	3358300000.00000000
1996-07-01	-3678000000.00000000
1996-10-01	622900000.00000000
1997-01-01	-3339500000.00000000
1997-04-01	3998000000.00000000
1997-07-01	-2600100000.00000000
1997-10-01	-9980100000.00000000
1998-01-01	9357000000.00000000
1998-04-01	11262000000.00000000
1998-07-01	5543800000.00000000
1998-10-01	4812200000.00000000
1999-01-01	6314000000.00000000
1999-04-01	4963400000.00000000
1999-07-01	2672500000.00000000
1999-10-01	9033000000.00000000
2000-01-01	10561500000.00000000
2000-04-01	6764900000.00000000
2000-07-01	3986700000.00000000
2000-10-01	2458100000.00000000
2001-01-01	139500000.00000000
2001-04-01	49000000.00000000
2001-07-01	3748100000.00000000
2001-10-01	3639200000.00000000
2002-01-01	3284000000.00000000
2002-04-01	2079699999.99999980
2002-07-01	4305400000.00000000
2002-10-01	2130300000.00000020
2003-01-01	926200000.00000000
2003-04-01	5720000000.00000000
2003-07-01	8516700000.00000100
2003-10-01	10686500000.00000000
2004-01-01	8746900000.00000000
2004-04-01	4005500000.00000000
2004-07-01	6805700000.00000000
2004-10-01	19152400000.00000000
2005-01-01	9513700000.00000000
2005-04-01	2817200000.00000000
2005-07-01	2300100000.00000000
2005-10-01	5174800000.00000000
2006-01-01	5679300000.00000000
2006-04-01	4315900000.00000000
2006-07-01	3688800000.00000000
2006-10-01	8428900000.00000000
2007-01-01	3998300000.00000000
2007-04-01	6250100000.00000000
2007-07-01	2495800000.00000000
2007-10-01	2384200000.00000000
2008-01-01	-3850000000.00000000
2008-04-01	-5717700000.00000000
2008-07-01	-12883100000.00000000
2008-10-01	-33995199999.99999600
2009-01-01	9017400000.00000000
2009-04-01	19541800000.00000000
2009-07-01	23492600000.00000000
2009-10-01	16614599999.99999800
2010-01-01	8568200000.00000100
2010-04-01	5536800000.00000000
2010-07-01	10377900000.00000000
2010-10-01	2487700000.00000000
2011-01-01	3519400000.00000000
2011-04-01	2618000000.00000000
2011-07-01	-6326100000.00000000
2011-10-01	14141500000.00000000
2012-01-01	6447800000.00000000
2012-04-01	-671100000.00000000
2012-07-01	3916500000.00000000
2012-10-01	3491300000.00000000
2013-01-01	4560400000.00000000
2013-04-01	-4106100000.00000050
2013-07-01	6669000000.00000000
2013-10-01	9172800000.00000000
2014-01-01	7023700000.00000000
2014-04-01	11169600000.00000000
2014-07-01	5832000000.00000000
2014-10-01	-6139500000.00000000
2015-01-01	7110100000.00000000
2015-04-01	7301900000.00000000
2015-07-01	-4286700000.00000000
2015-10-01	1927300000.00000000
2016-01-01	-1333700000.00000000
2016-04-01	919400000.00000000
2016-07-01	6959200000.00000000
2016-10-01	1070300000.00000000
2017-01-01	736300000.00000000
2017-04-01	214200000.00000000
2017-07-01	-151300000.00000000
2017-10-01	3560800000.00000000
2018-01-01	2787800000.00000000
2018-04-01	9802500000.00000000
2018-07-01	2146300000.00000020