Quarter	US Dollars, sum over component sub-periods
1999-01-01	184943158493.76797
1999-04-01	195643924815.99300
1999-07-01	192320667871.57300
1999-10-01	204812305911.04700
2000-01-01	203620956711.57098
2000-04-01	227379487996.19800
2000-07-01	214798577802.38800
2000-10-01	217741007506.39902
2001-01-01	208169497107.03198
2001-04-01	206665953239.74200
2001-07-01	186541961869.17400
2001-10-01	162511897659.57300
2002-01-01	165395876449.06400
2002-04-01	202312111814.66500
2002-07-01	192517778620.17700
2002-10-01	188980306032.36200
2003-01-01	192842337805.01600
2003-04-01	227309357060.65200
2003-07-01	205524509214.67200
2003-10-01	219712535754.70798
2004-01-01	224500788217.59000
2004-04-01	264182524284.16098
2004-07-01	249829056256.76100
2004-10-01	280782269439.20404
2005-01-01	291796729064.65800
2005-04-01	338874259589.49000
2005-07-01	320059763161.69500
2005-10-01	351457326021.29200
2006-01-01	363778947314.85200
2006-04-01	447672947286.65600
2006-07-01	435314272954.06600
2006-10-01	469178264955.09700
2007-01-01	482200740813.71000
2007-04-01	579831787249.66400
2007-07-01	542958787986.81195
2007-10-01	557281754381.39000
2008-01-01	520719551737.74304
2008-04-01	579541490085.79800
2008-07-01	480067104109.67100
2008-10-01	428579285423.83800
2009-01-01	325089555951.45400
2009-04-01	368184777293.29600
2009-07-01	306848205768.58900
2009-10-01	327617197581.33100
2010-01-01	318483364869.27100
2010-04-01	362548785795.85400
2010-07-01	322711830124.43600
2010-10-01	347063190059.26196
2011-01-01	341384066006.83500
2011-04-01	429429969746.09600
2011-07-01	359567543748.50305
2011-10-01	346136067869.80800
2012-01-01	340895835831.11395
2012-04-01	397779165724.08500
2012-07-01	340058908506.35400
2012-10-01	351098551913.96000
2013-01-01	344237167878.85895
2013-04-01	398965930440.21300
2013-07-01	350073793749.11100
2013-10-01	357031217652.17500
2014-01-01	346442019732.11300
2014-04-01	423876607029.57600
2014-07-01	356600072432.05896
2014-10-01	362434600631.26800
2015-01-01	324474481839.59700
2015-04-01	392173855217.84100
2015-07-01	331540639840.01800
2015-10-01	333201671875.56200
2016-01-01	318940068078.02100
2016-04-01	404763863593.99700
2016-07-01	337371937930.48000
2016-10-01	339061171665.93500
2017-01-01	324518641088.68100
2017-04-01	418676196015.64100
2017-07-01	370019880975.71700
2017-10-01	390761604643.19500
2018-01-01	391465340638.29803