Quarter	US Dollars, sum over component sub-periods
1999-01-01	-457869580.45560300
1999-04-01	-1035298178.82627000
1999-07-01	174393461.91763300
1999-10-01	-1282721465.65910000
2000-01-01	-487313697.19103200
2000-04-01	-105622011.71721300
2000-07-01	-121635791.94871300
2000-10-01	-515084451.66357900
2001-01-01	-251791069.83072600
2001-04-01	-205519664.27170798
2001-07-01	-251919718.50986300
2001-10-01	-2192591063.08546000
2002-01-01	-544474480.83751390
2002-04-01	-709390664.19268600
2002-07-01	-657103771.05041900
2002-10-01	-336457048.02133600
2003-01-01	-2940810507.94906000
2003-04-01	-402105606.17290700
2003-07-01	-458254973.71789700
2003-10-01	-355780777.33726597
2004-01-01	-643077073.69905600
2004-04-01	219354811.14339298
2004-07-01	335013571.13981800
2004-10-01	-358567357.06568600
2005-01-01	-801869781.18293600
2005-04-01	-291219434.75237500
2005-07-01	-306460574.85662496
2005-10-01	-538185124.52130400
2006-01-01	-1661081361.90881010
2006-04-01	-374048989.50406800
2006-07-01	-378030026.97616400
2006-10-01	-450305487.41054900
2007-01-01	-500321601.40979700
2007-04-01	685228402.61819790
2007-07-01	-489180710.33734703
2007-10-01	-15597511640.52400000
2008-01-01	-809930945.33983900
2008-04-01	-1494108565.05755020
2008-07-01	-546571230.16088590
2008-10-01	828211978.13712500
2009-01-01	669264842.42399100
2009-04-01	-327382219.76146500
2009-07-01	656278410.59003590
2009-10-01	971804641.34810400
2010-01-01	152768030.99641200
2010-04-01	472949505.33990900
2010-07-01	836146465.63540300
2010-10-01	281508253.00881600
2011-01-01	-146156405.02918200
2011-04-01	368316146.92046500
2011-07-01	575093010.33881300
2011-10-01	1465084091.32665000
2012-01-01	-11454256077.10260000
2012-04-01	592062420.24011600
2012-07-01	976176495.77909200
2012-10-01	1071207076.61621010
2013-01-01	114532139.64442800
2013-04-01	407213873.79134595
2013-07-01	346119637.84835400
2013-10-01	4053396583.33059020
2014-01-01	-1979128094.76931000
2014-04-01	-1966794983.80857000
2014-07-01	-2332352374.92060000
2014-10-01	-1131395345.42838000
2015-01-01	-1836064916.11626000
2015-04-01	-2161327883.56640000
2015-07-01	-34351450.45415610
2015-10-01	103408846.51937501
2016-01-01	-2180351636.26201960
2016-04-01	70801931.99811980
2016-07-01	-1608194926.34193020
2016-10-01	-402988441.45150800
2017-01-01	-20477982886.42860000
2017-04-01	-6297322816.23060000
2017-07-01	-6645502708.11676000
2017-10-01	-1758740228.16535000
2018-01-01	1140275541.36803000
2018-04-01	628242777.47077800