Quarter	US Dollars, sum over component sub-periods
1999-01-01	-57519684008.124400
1999-04-01	18577138568.208897
1999-07-01	-36431030039.812004
1999-10-01	-45956978803.260605
2000-01-01	24874387112.840797
2000-04-01	-129242478368.375000
2000-07-01	-49317049377.475900
2000-10-01	10295890811.839000
2001-01-01	-164830681965.455020
2001-04-01	-46311434876.546700
2001-07-01	-74438859203.471700
2001-10-01	38806548552.493400
2002-01-01	-97460704428.648400
2002-04-01	-684687622.556996
2002-07-01	-18940068878.260098
2002-10-01	51190253196.033800
2003-01-01	-118882362957.017000
2003-04-01	-17642205664.127300
2003-07-01	-78436238812.285800
2003-10-01	-52061520450.407000
2004-01-01	-92344492981.859500
2004-04-01	16507544799.185900
2004-07-01	-28287652132.711903
2004-10-01	32750678611.832300
2005-01-01	35286764341.637400
2005-04-01	25687788720.579600
2005-07-01	-67952164987.556610
2005-10-01	79520538950.821610
2006-01-01	-57476518515.947500
2006-04-01	25526973860.579002
2006-07-01	-195194547463.350000
2006-10-01	29093574626.677200
2007-01-01	-133349208168.674000
2007-04-01	79438251536.668290
2007-07-01	-167277215334.665000
2007-10-01	188960579200.968000
2008-01-01	-97658850973.033200
2008-04-01	132403775764.601010
2008-07-01	50497876776.087300
2008-10-01	70596364078.129210
2009-01-01	-75166492993.472000
2009-04-01	78977644635.526400
2009-07-01	-232015052402.628000
2009-10-01	153900334178.021000
2010-01-01	113943997256.906000
2010-04-01	182632339095.884980
2010-07-01	-71320927246.136610
2010-10-01	-117569684040.696000
2011-01-01	-93393757221.362200
2011-04-01	30197260430.022200
2011-07-01	90891579557.649600
2011-10-01	17979452140.662000
2012-01-01	-281422776971.693000
2012-04-01	76453790760.592600
2012-07-01	-246051918418.634000
2012-10-01	65044110470.271600
2013-01-01	-73457394930.847200
2013-04-01	-134770004359.327000
2013-07-01	42960372333.390500
2013-10-01	-52662128192.593100
2014-01-01	-78620507592.665100
2014-04-01	-198757418209.573000
2014-07-01	58018117291.246400
2014-10-01	-82092570965.101200
2015-01-01	53698571435.176500
2015-04-01	79439262028.372100
2015-07-01	-233751597186.627000
2015-10-01	-26406380976.065800
2016-01-01	-220235369412.413020
2016-04-01	82888896682.954590
2016-07-01	28924176673.609200
2016-10-01	61908317796.191600
2017-01-01	-217311218444.225980
2017-04-01	-42972137174.455200
2017-07-01	-99422214304.130200
2017-10-01	31138533324.929996
2018-01-01	-140322502707.614000