Quarter	US Dollars, sum over component sub-periods
1990-01-01	468729813.84696700
1990-04-01	-738425169.61042390
1990-07-01	-494075424.40469396
1990-10-01	-1422542479.08297000
1991-01-01	1320378542.18725010
1991-04-01	-1845507013.84581000
1991-07-01	1792483596.69216010
1991-10-01	1584261847.41025020
1992-01-01	1204846863.30250000
1992-04-01	-248281189.64851300
1992-07-01	-944109694.86288110
1992-10-01	1020760624.10183000
1993-01-01	807016495.33827400
1993-04-01	-74237841.83862280
1993-07-01	514294075.01391697
1993-10-01	1583990212.34947010
1994-01-01	5234569522.61764050
1994-04-01	1308688676.13775000
1994-07-01	1887499159.24491000
1994-10-01	-170824116.16337300
1995-01-01	566562094.97891700
1995-04-01	-1145851329.67400000
1995-07-01	391619879.10973000
1995-10-01	-617691523.12115800
1996-01-01	1639739126.07159000
1996-04-01	1313941355.81361000
1996-07-01	2030372314.87467000
1996-10-01	2658968271.40061000
1997-01-01	3765447806.97512000
1997-04-01	4001437793.91335000
1997-07-01	1521466157.61141000
1997-10-01	251231045.44351300
1998-01-01	2724705110.38970000
1998-04-01	-424309580.95482796
1998-07-01	2404809854.47341970
1998-10-01	1232068331.38192990
1999-01-01	4872827063.18771100
1999-04-01	860253204.78485400
1999-07-01	-232266900.69636300
1999-10-01	1049060099.50998010
2000-01-01	2553502843.86638980
2000-04-01	30158638.97614820
2000-07-01	-215827464.75258100
2000-10-01	7202190402.64111000
2001-01-01	3614062174.81333970
2001-04-01	3107061099.99159000
2001-07-01	1196920898.79134000
2001-10-01	2303958087.72172980
2002-01-01	5965150464.80110000
2002-04-01	2420741580.52584030
2002-07-01	2493713245.81708000
2002-10-01	4425396291.62889000
2003-01-01	3388836370.42625000
2003-04-01	4532570760.23657000
2003-07-01	7880105705.71302000
2003-10-01	7081254533.06666000
2004-01-01	10840921145.68599900
2004-04-01	9200994589.74658000
2004-07-01	-2023865231.63312980
2004-10-01	4538010620.71818000
2005-01-01	16099929227.72810000
2005-04-01	636745233.87076400
2005-07-01	7140756937.21791000
2005-10-01	-2338352953.61624000
2006-01-01	17510894705.90490000
2006-04-01	5487033812.88372000
2006-07-01	5998865656.49232000
2006-10-01	17168148412.71140100
2007-01-01	22061806503.02450000
2007-04-01	19078972896.41660000
2007-07-01	24012811834.00220000
2007-10-01	26279930364.15220000
2008-01-01	23638651157.18420000
2008-04-01	13076189348.27910000
2008-07-01	263136054.89310497
2008-10-01	-14075832591.10290100
2009-01-01	4710240042.43134000
2009-04-01	4229000000.00000000
2009-07-01	12942000000.88050000
2009-10-01	6715999999.94508000
2010-01-01	5581000000.66045000
2010-04-01	12777873747.29270000
2010-07-01	12685089400.13980000
2010-10-01	18301642120.92500000
2011-01-01	10084489182.43740000
2011-04-01	17308089302.71610000
2011-07-01	8467131967.40171900
2011-10-01	-10597401320.17440000
2012-01-01	2015688059.47786000
2012-04-01	6244853542.00014000
2012-07-01	10227719233.53900000
2012-10-01	4504261675.92607000
2013-01-01	11092220460.80160000
2013-04-01	15439229832.67750000
2013-07-01	11616113312.06040000
2013-10-01	36215163701.54739000
2014-01-01	32648887053.26310000
2014-04-01	28829125311.77560000
2014-07-01	23356926806.75860200
2014-10-01	26576409330.72080000
2015-01-01	46006909945.27319000
2015-04-01	25133324943.01740000
2015-07-01	15555209629.53640200
2015-10-01	19051181156.62420000
2016-01-01	16997845121.35569800
2016-04-01	17721030609.12460000
2016-07-01	21124371989.42930000
2016-10-01	27486680271.92110000
2017-01-01	25781092136.98820000
2017-04-01	28127907403.74170300
2017-07-01	28807686358.34010000
2017-10-01	26457728761.06330000
2018-01-01	34151406266.15769600