Quarter	US Dollars, sum over component sub-periods
1981-01-01	-11968554.1810349990
1981-04-01	-11273961.1884605000
1981-07-01	-10525209.3642899000
1981-10-01	-10991335.1381874010
1982-01-01	5882181.6285124910
1982-04-01	6089575.8651969700
1982-07-01	5273819.3004108000
1982-10-01	5040970.9368177500
1983-01-01	6048250.9916946795
1983-04-01	6276459.9224536300
1983-07-01	5943114.3831734990
1983-10-01	5732726.0338140195
1984-01-01	-26283856.7016159000
1984-04-01	-25834133.4836161000
1984-07-01	-24126162.2396370020
1984-10-01	-22845814.4710089000
1985-01-01	3204341.3939244696
1985-04-01	3375096.5109340800
1985-07-01	3598856.8009694800
1985-10-01	3723462.4559164100
1986-01-01	273115.7446376810
1986-04-01	135274.7494459410
1986-07-01	270730.4549148890
1986-10-01	133966.1281078470
1987-01-01	-34257397.8025480960
1987-04-01	-35622755.6391773000
1987-07-01	-35657340.8920512050
1987-10-01	-37237533.4914894000
1988-01-01	-43519100.1123735000
1988-04-01	-44279013.5247682000
1988-07-01	-40518889.8260194000
1988-10-01	-41898346.0779547000
1989-01-01	-37745166.5618772950
1989-04-01	-36402779.5885591950
1989-07-01	-36105366.6743307040
1989-10-01	-37405105.8692925000
1990-01-01	-54490795.8188073000
1990-04-01	-54710719.9702168000
1990-07-01	-57860291.8884341940
1990-10-01	-60766881.7574372000
1991-01-01	-57838019.1480857950
1991-04-01	-51382419.7828796000
1991-07-01	-50942687.4289759000
1991-10-01	-54315018.9955880940
1992-01-01	-36980191.3900143950
1992-04-01	-41832511.0472388040
1992-07-01	-45548966.7683834000
1992-10-01	-48152674.0687406000
1993-01-01	-22290769.5542422000
1993-04-01	-33132052.8369745000
1993-07-01	-31455631.9656937000
1993-10-01	-38910935.9084646000
1994-01-01	-34224541.6706097050
1994-04-01	-37609231.4858779000
1994-07-01	-39622170.3617194000
1994-10-01	-45318748.9124317000
1995-01-01	-9965816.3821225600
1995-04-01	-10575948.3258517000
1995-07-01	-9515761.8778614700
1995-10-01	-139478733.7458720200
1996-01-01	3740266.9422356800
1996-04-01	-5660307.3749000200
1996-07-01	-11178396.2690021000
1996-10-01	-114218934.7627790000
1997-01-01	-62672581.4791201950
1997-04-01	-40942248.5382054000
1997-07-01	34726753.4412165000
1997-10-01	-40274056.8556796000
1998-01-01	-8748578.8162000900
1998-04-01	-38590341.9866429000
1998-07-01	10222685.8601085990
1998-10-01	-79017746.6351933000
1999-01-01	-17881220.9679022000
1999-04-01	51699782.6375300960
1999-07-01	-17215814.4355474000
1999-10-01	-74784716.2895820000
2000-01-01	-66195815.2667773000
2000-04-01	-58450061.5302460040
2000-07-01	-38520733.8530947000
2000-10-01	-118993895.7348760000
2001-01-01	-19131190.8968542000
2001-04-01	-41744510.8147207950
2001-07-01	-28361400.4494813000
2001-10-01	-6403435.5583713800
2002-01-01	-18076038.0343214980
2002-04-01	-27592003.4467179000
2002-07-01	-72309942.2939529000
2002-10-01	-80038749.8065996000
2003-01-01	4962162.5947060800
2003-04-01	-102631027.8532440000
2003-07-01	71030504.4795405000
2003-10-01	706315616.3638040000
2004-01-01	11735279.1819158000
2004-04-01	-71897826.7126829900
2004-07-01	-33790038.7795423000
2004-10-01	-58431741.6457540000
2005-01-01	-81635815.7069260900
2005-04-01	-19093677.0402971000
2005-07-01	-95455126.0977259000
2005-10-01	-105004305.4599729900
2006-01-01	-13187094.2391251000
2006-04-01	-92391151.7060961000
2006-07-01	-27780392.1568628000
2006-10-01	-24781160.1380172000
2007-01-01	-25848211.3975406000
2007-04-01	-97620194.7852067000
2007-07-01	-20330648.5115835000
2007-10-01	-24829023.7657484000
2008-01-01	-41373912.9419048000
2008-04-01	-43449878.2916573960
2008-07-01	-107337781.0781610000
2008-10-01	-21285836.8764518000
2009-01-01	-54706269.0439145040
2009-04-01	-86843564.9664253000
2009-07-01	-11622909.1400996000
2009-10-01	-70897409.1135014900
2010-01-01	-123128962.7057060000
2010-04-01	-31452485.7393076000
2010-07-01	-11862349.4739745000
2010-10-01	-96351933.7829210900
2011-01-01	-50322499.0970729000
2011-04-01	-21887621.9362983000
2011-07-01	-15813649.2918008000
2011-10-01	-210187157.6356060200
2012-01-01	-123957429.2606100000
2012-04-01	-34781727.9567601000
2012-07-01	-28113436.9617192000
2012-10-01	-38048989.0249192040
2013-01-01	-118787188.2014140000
2013-04-01	-48041704.1804211960
2013-07-01	-25214016.7968558040
2013-10-01	-50518722.8748728000
2014-01-01	-79755908.5083256000
2014-04-01	-72024270.4016861000
2014-07-01	-17295265.1293517000
2014-10-01	-31516049.2054920980
2015-01-01	-93426304.7329327000
2015-04-01	-16378331.0164148000
2015-07-01	-3527309.2664056500
2015-10-01	-4453749.0490499900
2016-01-01	-86053600.0349752000
2016-04-01	-7634762.5029094400
2016-07-01	3124260.2667030403
2016-10-01	-2744162.1926398200
2017-01-01	-16117549.2602436000
2017-04-01	-61877981.0620966000
2017-07-01	-7534486.9822498210
2017-10-01	-10776541.0160755000
2018-01-01	-97188334.0908295000
2018-04-01	-124765.4222783880