Quarter	US Dollars, sum over component sub-periods
1999-01-01	442215630557.429000
1999-04-01	512949345168.486000
1999-07-01	293047412333.011960
1999-10-01	420167814349.769000
2000-01-01	885248280099.839000
2000-04-01	489482799719.233030
2000-07-01	486840242691.414000
2000-10-01	510716988645.532960
2001-01-01	926842789924.448000
2001-04-01	276656061611.989000
2001-07-01	56811812388.474500
2001-10-01	307093751956.389950
2002-01-01	177478887605.371000
2002-04-01	405385746844.166000
2002-07-01	294552518560.721000
2002-10-01	324898350590.712000
2003-01-01	681267637158.790000
2003-04-01	618028278891.442000
2003-07-01	214651333634.059000
2003-10-01	407306201152.144000
2004-01-01	1273055261846.770000
2004-04-01	599369278646.822000
2004-07-01	721035947530.086000
2004-10-01	836921652425.570000
2005-01-01	1133393498617.320000
2005-04-01	1074253747889.709800
2005-07-01	809563208413.398000
2005-10-01	718182331323.226000
2006-01-01	1659409122521.080000
2006-04-01	763371120611.774000
2006-07-01	981934247557.814000
2006-10-01	1007869281675.600000
2007-01-01	2181499959205.269800
2007-04-01	1904098684244.420000
2007-07-01	1011243216843.160000
2007-10-01	1026583606137.640000
2008-01-01	1621018797187.450200
2008-04-01	-446106667656.592000
2008-07-01	15999173722.215302
2008-10-01	-1530267440247.930000
2009-01-01	-256104063121.538000
2009-04-01	14558200112.028900
2009-07-01	414416025883.520000
2009-10-01	-158034868579.365000
2010-01-01	863456496272.892000
2010-04-01	499566538115.687000
2010-07-01	1132868384934.420000
2010-10-01	292726796305.703000
2011-01-01	1002421769134.660000
2011-04-01	341966542109.977970
2011-07-01	600107541419.573000
2011-10-01	-451693123295.384000
2012-01-01	557355284332.073000
2012-04-01	-157708591318.610020
2012-07-01	350722338784.531000
2012-10-01	32079827799.131300
2013-01-01	389407461401.199000
2013-04-01	460523228603.645000
2013-07-01	-153228665594.577000
2013-10-01	156365888557.180000
2014-01-01	751968279378.032000
2014-04-01	717978388370.872100
2014-07-01	703670179072.920000
2014-10-01	194181994813.791020
2015-01-01	1000440376774.480000
2015-04-01	-98586496232.752400
2015-07-01	187022009503.586030
2015-10-01	-200655117171.060000
2016-01-01	561208380568.287000
2016-04-01	1112114000293.630000
2016-07-01	391300432527.107000
2016-10-01	-37077585353.208100
2017-01-01	1144736239902.609900
2017-04-01	624695085487.212000
2017-07-01	893623898386.917000
2017-10-01	396064318588.173030
2018-01-01	1083706609165.299900