Quarter	US Dollars, sum over component sub-periods
1999-01-01	25739520839.508200
1999-04-01	27483111222.784500
1999-07-01	26666755472.520600
1999-10-01	27277747118.029700
2000-01-01	27227971324.806400
2000-04-01	26989173720.137300
2000-07-01	25067661430.876900
2000-10-01	26198509132.829900
2001-01-01	27528134150.209103
2001-04-01	28463163528.597100
2001-07-01	31130082168.100500
2001-10-01	29049902099.706700
2002-01-01	33346281763.227000
2002-04-01	33405405578.191400
2002-07-01	35795876334.388600
2002-10-01	38226619615.345900
2003-01-01	42240711978.938300
2003-04-01	43535304341.414795
2003-07-01	41852818521.114000
2003-10-01	42305002069.399300
2004-01-01	44338085027.033394
2004-04-01	41418602848.320100
2004-07-01	39358250691.010500
2004-10-01	42998094558.834496
2005-01-01	51514287676.841290
2005-04-01	46280052308.838400
2005-07-01	46468596944.732400
2005-10-01	43448097004.894905
2006-01-01	51836554641.489204
2006-04-01	51302055857.687400
2006-07-01	46158727514.419800
2006-10-01	49659329203.488000
2007-01-01	48004628998.805700
2007-04-01	52335364210.511795
2007-07-01	48414217036.632400
2007-10-01	54122049830.336200
2008-01-01	63771785225.512000
2008-04-01	63701693483.332000
2008-07-01	52783486667.643005
2008-10-01	56279076141.437400
2009-01-01	59706267425.213196
2009-04-01	55091411359.639900
2009-07-01	47959626500.764800
2009-10-01	53402466473.693100
2010-01-01	53634086433.624000
2010-04-01	55172819682.171196
2010-07-01	52267321861.224300
2010-10-01	56959018451.446800
2011-01-01	61297321360.715004
2011-04-01	68130307815.891600
2011-07-01	59507003283.714400
2011-10-01	60781917215.183500
2012-01-01	63973963428.979200
2012-04-01	64648605901.226400
2012-07-01	61585049281.523800
2012-10-01	66226804430.375700
2013-01-01	77142342949.776100
2013-04-01	73205553350.315800
2013-07-01	69454453992.103400
2013-10-01	74121857484.338610
2014-01-01	85124168469.715200
2014-04-01	95090196548.819000
2014-07-01	73962234842.231800
2014-10-01	74291642889.575700
2015-01-01	77246158825.964900
2015-04-01	83002120935.119900
2015-07-01	72115643049.145600
2015-10-01	75174005448.094000
2016-01-01	76618815179.757400
2016-04-01	83324224082.607200
2016-07-01	74470059417.615700
2016-10-01	80392795864.509200
2017-01-01	84516348101.296900
2017-04-01	84725765602.069400
2017-07-01	87015821287.581590
2017-10-01	83624328945.725600
2018-01-01	86274729967.753200