Quarter	US Dollars, sum over component sub-periods
1999-01-01	196458680558.552000
1999-04-01	208131813965.485000
1999-07-01	247581433318.477020
1999-10-01	140769882691.895020
2000-01-01	174435497978.027000
2000-04-01	246424832181.201000
2000-07-01	220994780082.417020
2000-10-01	109822047977.833010
2001-01-01	238899076645.181000
2001-04-01	201231247899.834000
2001-07-01	85672131109.497700
2001-10-01	147296231705.197000
2002-01-01	49342835466.565500
2002-04-01	194698878387.545000
2002-07-01	42430189079.736300
2002-10-01	66358677991.534904
2003-01-01	177070037071.614000
2003-04-01	254214561884.527000
2003-07-01	86573106762.230600
2003-10-01	182000646082.444980
2004-01-01	311548689193.469000
2004-04-01	210473400030.021000
2004-07-01	293005228851.245000
2004-10-01	237238842302.556000
2005-01-01	372544505245.444030
2005-04-01	379281656259.396000
2005-07-01	353512589107.495000
2005-10-01	341716953041.960000
2006-01-01	488815030570.783000
2006-04-01	327099371552.235000
2006-07-01	429066551808.900000
2006-10-01	471666826527.601000
2007-01-01	520080882109.233030
2007-04-01	549745674402.785030
2007-07-01	218565437836.186980
2007-10-01	32745458553.717300
2008-01-01	151125711778.280000
2008-04-01	98788486391.952100
2008-07-01	-244447016265.548000
2008-10-01	-555673547604.765000
2009-01-01	288555919305.966000
2009-04-01	284897026306.639040
2009-07-01	295007634142.382000
2009-10-01	38167116474.117905
2010-01-01	194729147391.707980
2010-04-01	-39200173849.173904
2010-07-01	396391131689.167000
2010-10-01	142734669005.929000
2011-01-01	214852438610.890000
2011-04-01	147824329892.885000
2011-07-01	-278811728198.716000
2011-10-01	-273938142831.565000
2012-01-01	206198680411.496000
2012-04-01	-36683953199.957405
2012-07-01	300553716280.909000
2012-10-01	161393554837.083000
2013-01-01	139646867092.210020
2013-04-01	141286167700.839000
2013-07-01	95427378056.803390
2013-10-01	215596226732.453000
2014-01-01	297087878982.188000
2014-04-01	474600663204.186040
2014-07-01	257652950601.845000
2014-10-01	279314373594.996000
2015-01-01	557069559089.646000
2015-04-01	160162189020.113000
2015-07-01	54848668389.696300
2015-10-01	25459926958.020700
2016-01-01	110181575168.536000
2016-04-01	213761686752.229980
2016-07-01	102307363782.096000
2016-10-01	-59782360845.938800
2017-01-01	340348979199.660030
2017-04-01	397360869964.189000
2017-07-01	303015496016.722960
2017-10-01	131441772376.418000
2018-01-01	530075721048.878970