Quarter	US Dollars, sum over component sub-periods
1999-01-01	171188069214.29700
1999-04-01	180491586316.65698
1999-07-01	202213302111.38700
1999-10-01	188406482644.62800
2000-01-01	178581873319.71800
2000-04-01	189828880917.68800
2000-07-01	207105033741.54700
2000-10-01	188108377415.29400
2001-01-01	183637595228.86900
2001-04-01	189184276514.76498
2001-07-01	201015611539.59600
2001-10-01	178614101437.51400
2002-01-01	178265569024.91100
2002-04-01	195932143163.95800
2002-07-01	223538324578.86000
2002-10-01	209325048550.18800
2003-01-01	205764682167.70700
2003-04-01	219414971486.66300
2003-07-01	241923717236.32000
2003-10-01	236233294364.27500
2004-01-01	247727243559.26300
2004-04-01	262607216228.31897
2004-07-01	284894242417.51500
2004-10-01	284013399322.42800
2005-01-01	280193163625.81400
2005-04-01	290129608663.37000
2005-07-01	309244365726.37800
2005-10-01	296978975082.98000
2006-01-01	298298798810.26400
2006-04-01	321963091905.16600
2006-07-01	348110072483.42600
2006-10-01	344712008844.80300
2007-01-01	341205412436.81500
2007-04-01	371499347266.15600
2007-07-01	409241999398.53800
2007-10-01	406675224280.63100
2008-01-01	392658898627.49800
2008-04-01	427255275382.96704
2008-07-01	438164360039.20600
2008-10-01	385852242373.11200
2009-01-01	340613057652.85900
2009-04-01	361272336317.85803
2009-07-01	398898544293.52900
2009-10-01	389319730775.45404
2010-01-01	366883148286.85900
2010-04-01	384229460123.55500
2010-07-01	417155253290.61200
2010-10-01	414159604543.55700
2011-01-01	405263954240.71295
2011-04-01	447635053634.09400
2011-07-01	475067210454.24400
2011-10-01	440492619340.92900
2012-01-01	427293919466.41600
2012-04-01	447237326496.19200
2012-07-01	467874157352.38696
2012-10-01	460515876610.53100
2013-01-01	446717664555.79600
2013-04-01	475557578233.60600
2013-07-01	500228056954.15204
2013-10-01	492000967303.45200
2014-01-01	479478301834.95400
2014-04-01	525961885395.07404
2014-07-01	536154741736.81494
2014-10-01	513024678069.01000
2015-01-01	470984243383.09000
2015-04-01	495800009712.25700
2015-07-01	515823389532.41400
2015-10-01	503175470091.68300
2016-01-01	475686497545.93300
2016-04-01	505395393918.33400
2016-07-01	522227950192.34796
2016-10-01	508005850819.57100
2017-01-01	489163239969.66797
2017-04-01	518929902564.04400
2017-07-01	559141597090.25500
2017-10-01	557680317382.04600
2018-01-01	543756999149.68396