Quarter	US Dollars, sum over component sub-periods
1999-01-01	1454409.15356429000
1999-04-01	-597969.37181197790
1999-07-01	230417.11928368200
1999-10-01	-6757097.53544495000
2000-01-01	-20122514.30091060000
2000-04-01	12110368.50213120000
2000-07-01	10533876.28376420000
2000-10-01	328576.54653959800
2001-01-01	1243363.36350250000
2001-04-01	9923542.45405877000
2001-07-01	2470388.85200526000
2001-10-01	2929242.15001011000
2002-01-01	-2442313.61928985000
2002-04-01	6189325.61201884000
2002-07-01	6806547.40364197000
2002-10-01	9107346.38787507000
2003-01-01	-25924424.51715550200
2003-04-01	141810.67987554200
2003-07-01	-15392456.27343830100
2003-10-01	-37224211.97708810000
2004-01-01	-77029348.80236271000
2004-04-01	-3261674.55479888000
2004-07-01	-34162183.40825900000
2004-10-01	1333775.28469152000
2005-01-01	19489973.94358470000
2005-04-01	9917871.93228267100
2005-07-01	-5815454.61647309000
2005-10-01	-6458612.68297504000
2006-01-01	1396741.77318399000
2006-04-01	1696388.37354100980
2006-07-01	-5597070.77616384100
2006-10-01	23339477.70379959800
2007-01-01	-37109136.60181520000
2007-04-01	-14563554.63910320000
2007-07-01	-20779892.66943040000
2007-10-01	-40473998.08048850000
2008-01-01	-14971763.03866860000
2008-04-01	259270674.22917998000
2008-07-01	56323400.40634580000
2008-10-01	117942738.47705200000
2009-01-01	6672601.43880731000
2009-04-01	-674673.13732782400
2009-07-01	-12078175.76270140100
2009-10-01	-16118083.69949620000
2010-01-01	-163978.75632724303
2010-04-01	8622073.18551275000
2010-07-01	4517714.64783330000
2010-10-01	-303581133.62557100000
2011-01-01	-76298260.45155810000
2011-04-01	8168934.29877477900
2011-07-01	8244957.23344115900
2011-10-01	19021038.73288250000
2012-01-01	-8093985.49020420900
2012-04-01	-5782275.23099488000
2012-07-01	21050967.93422110000
2012-10-01	27872465.03871470000
2013-01-01	13348863.84184450000
2013-04-01	29161119.67427620000
2013-07-01	6593470.56735552900
2013-10-01	-25741492.41477090000
2014-01-01	27876603.43610900000
2014-04-01	11922322.68951000000
2014-07-01	-22253396.97940090000
2014-10-01	-44406280.79831130000
2015-01-01	14009719.51923710000
2015-04-01	-127724281.21206900000
2015-07-01	22078431.87809330200
2015-10-01	-27863115.75627090000
2016-01-01	13123430.03934650000
2016-04-01	13287871.64740960100
2016-07-01	-289740728.54269700000
2016-10-01	-68828205.45299430000
2017-01-01	6840119.07541250000
2017-04-01	10445810.49241470200
2017-07-01	-73157785.31723390000
2017-10-01	-17520191.39726060000
2018-01-01	22318734.78101500000
2018-04-01	50470408.21062250400