Quarter	US Dollars, sum over component sub-periods
1999-01-01	196407540556.91000
1999-04-01	203820648389.60100
1999-07-01	210553063750.21200
1999-10-01	217901122358.57600
2000-01-01	228264970824.34198
2000-04-01	242609907151.56900
2000-07-01	235173347236.63602
2000-10-01	238554653891.69600
2001-01-01	240575013544.74500
2001-04-01	217266661968.18198
2001-07-01	202091792261.94300
2001-10-01	191729434633.62097
2002-01-01	197549796912.47000
2002-04-01	200804340143.02900
2002-07-01	212803638196.12802
2002-10-01	210412481530.92500
2003-01-01	229626916868.86200
2003-04-01	233933831272.50100
2003-07-01	235368190054.49700
2003-10-01	253270378670.17600
2004-01-01	291266906762.07500
2004-04-01	292693223825.16400
2004-07-01	302945090295.26200
2004-10-01	333968030259.48800
2005-01-01	370258208028.40200
2005-04-01	385706235247.48900
2005-07-01	385455680811.97003
2005-10-01	404158524139.11096
2006-01-01	443363516041.44100
2006-04-01	486431347109.33200
2006-07-01	500438845868.32800
2006-10-01	531500293078.05200
2007-01-01	565925069879.77700
2007-04-01	615512199491.39700
2007-07-01	629439919800.22100
2007-10-01	651985693828.13000
2008-01-01	633715874588.83700
2008-04-01	623149938501.85110
2008-07-01	573447045225.01500
2008-10-01	475816293622.34600
2009-01-01	418498848152.96600
2009-04-01	411726887289.09400
2009-07-01	414032746936.82500
2009-10-01	434932502127.72595
2010-01-01	439117588445.00600
2010-04-01	436006203782.81300
2010-07-01	441448816860.87100
2010-10-01	470401502686.57200
2011-01-01	482470189711.97595
2011-04-01	543755301904.81900
2011-07-01	507848355204.81200
2011-10-01	489653377232.54803
2012-01-01	478738746175.24100
2012-04-01	490053177075.57800
2012-07-01	463743635203.83400
2012-10-01	467059027027.37500
2013-01-01	452575639462.71405
2013-04-01	496667441514.42800
2013-07-01	470067731029.16600
2013-10-01	482404585321.65900
2014-01-01	474634830093.10900
2014-04-01	503164985050.41000
2014-07-01	482749393131.76404
2014-10-01	483915962535.13300
2015-01-01	441606959925.41700
2015-04-01	471154565792.92800
2015-07-01	443720156540.70795
2015-10-01	440842887354.23096
2016-01-01	421225341931.35000
2016-04-01	472455964931.24000
2016-07-01	452143973584.56600
2016-10-01	466364721901.64000
2017-01-01	451582533773.73596
2017-04-01	502712035753.02496
2017-07-01	517541095863.74200
2017-10-01	528741475223.61993
2018-01-01	532972502494.56000