Quarter	US Dollars, sum over component sub-periods
1999-01-01	-14577979238.796600
1999-04-01	-25254946117.243797
1999-07-01	-39758660099.897300
1999-10-01	-34334779083.812700
2000-01-01	-49458576065.165900
2000-04-01	-57545707623.426704
2000-07-01	-78077649591.558000
2000-10-01	-82307353024.931200
2001-01-01	-62437480123.432495
2001-04-01	-66645010921.317990
2001-07-01	-71085425364.908400
2001-10-01	-56538112475.898600
2002-01-01	-47080816156.576805
2002-04-01	-60713477917.116100
2002-07-01	-72979666198.084400
2002-10-01	-79901962387.283800
2003-01-01	-78874182685.038100
2003-04-01	-84396479683.068200
2003-07-01	-76991121155.151000
2003-10-01	-71830159775.608600
2004-01-01	-65641685378.927200
2004-04-01	-85617837163.297400
2004-07-01	-115242579339.650000
2004-10-01	-127734553202.099010
2005-01-01	-111982808153.345000
2005-04-01	-133111231117.137010
2005-07-01	-157904925102.134000
2005-10-01	-172589475894.462000
2006-01-01	-161388729256.316000
2006-04-01	-175025486349.589000
2006-07-01	-195951904089.969000
2006-10-01	-149537961311.044980
2007-01-01	-134362594495.508010
2007-04-01	-141095237742.173000
2007-07-01	-162090547770.832000
2007-10-01	-164755930399.856020
2008-01-01	-140680671352.642000
2008-04-01	-165823915357.052000
2008-07-01	-220160235819.431000
2008-10-01	-179738409290.995030
2009-01-01	-124464742759.071000
2009-04-01	-92338567902.110200
2009-07-01	-120917100076.938000
2009-10-01	-106254979523.219000
2010-01-01	-112130091492.103010
2010-04-01	-145462080328.395020
2010-07-01	-173900710042.020000
2010-10-01	-144715622235.616000
2011-01-01	-163626479354.783000
2011-04-01	-212741348254.326000
2011-07-01	-213873164081.218020
2011-10-01	-194592477002.328000
2012-01-01	-181854726385.001000
2012-04-01	-196391098481.641000
2012-07-01	-203195424189.295000
2012-10-01	-186281971885.138000
2013-01-01	-159215327876.120000
2013-04-01	-163084640091.491000
2013-07-01	-207754543822.983000
2013-10-01	-180629370455.370000
2014-01-01	-181301736571.054020
2014-04-01	-182981393063.268000
2014-07-01	-201375413147.506000
2014-10-01	-172028536071.382000
2015-01-01	-164441777802.974000
2015-04-01	-151409993954.727000
2015-07-01	-181124115140.562000
2015-10-01	-156618113456.363980
2016-01-01	-141360951478.506000
2016-04-01	-126466209734.041000
2016-07-01	-168811646435.384980
2016-10-01	-139657805695.124000
2017-01-01	-151596130471.815000
2017-04-01	-162034461076.707000
2017-07-01	-168215233045.314000
2017-10-01	-168210042546.859000
2018-01-01	-168523734793.173980