Quarter	US Dollars, sum over component sub-periods
1996-01-01	32248255389.931602
1996-04-01	31142258626.074398
1996-07-01	33221754000.259403
1996-10-01	33252177765.283300
1997-01-01	31639292589.685600
1997-04-01	30407541008.806202
1997-07-01	32058329995.039600
1997-10-01	30229850263.981903
1998-01-01	28860592897.347400
1998-04-01	27618446622.367900
1998-07-01	27648879533.631200
1998-10-01	28646104121.212600
1999-01-01	27963083100.077100
1999-04-01	27334498792.844300
1999-07-01	30059893300.789200
1999-10-01	31067211247.296700
2000-01-01	28680960742.939800
2000-04-01	28929147660.565197
2000-07-01	30629412033.624400
2000-10-01	29982875963.274600
2001-01-01	28555875102.201500
2001-04-01	28771805643.017800
2001-07-01	28581245627.262400
2001-10-01	25217180242.461100
2002-01-01	24979437701.103203
2002-04-01	27670404864.729900
2002-07-01	29144696707.218002
2002-10-01	29580076175.968502
2003-01-01	29622350037.266700
2003-04-01	24244521517.054800
2003-07-01	27948408774.800100
2003-10-01	31660938092.511800
2004-01-01	32237903228.370900
2004-04-01	33379142182.640396
2004-07-01	34730735200.206200
2004-10-01	36577988669.263405
2005-01-01	34775483417.254295
2005-04-01	34061816219.485104
2005-07-01	35669949174.803400
2005-10-01	34614555586.067000
2006-01-01	33231255464.447000
2006-04-01	35390869102.944000
2006-07-01	36232155127.478905
2006-10-01	36484439324.020195
2007-01-01	36178559673.096405
2007-04-01	39734961993.020200
2007-07-01	40836634372.940000
2007-10-01	41923195184.043600
2008-01-01	44288091956.935400
2008-04-01	44363670348.440400
2008-07-01	44376980970.374500
2008-10-01	45900507624.826996
2009-01-01	39744330939.313600
2009-04-01	38712886552.449810
2009-07-01	38085484374.098300
2009-10-01	39207572279.461300
2010-01-01	39465335619.168300
2010-04-01	40909963215.444900
2010-07-01	41648922849.529300
2010-10-01	42897991159.343000
2011-01-01	43362246752.390900
2011-04-01	42359431061.882805
2011-07-01	45217969085.682400
2011-10-01	45061495697.423996
2012-01-01	44362395231.707100
2012-04-01	46870580197.397995
2012-07-01	46832406455.905200
2012-10-01	46571638705.937900
2013-01-01	43126419099.384600
2013-04-01	42178781246.924000
2013-07-01	41781226824.468600
2013-10-01	43789804564.645096
2014-01-01	47194793788.479904
2014-04-01	50125545304.794010
2014-07-01	48539451248.535610
2014-10-01	46891482269.211700
2015-01-01	45067752307.417496
2015-04-01	45628976347.028110
2015-07-01	42006353118.582800
2015-10-01	45971470021.107300
2016-01-01	42535396229.453606
2016-04-01	47537222720.480100
2016-07-01	46462200774.787200
2016-10-01	49859994140.074295
2017-01-01	46144146596.188600
2017-04-01	49363808663.640396
2017-07-01	47113531390.431404
2017-10-01	50205712845.587100
2018-01-01	49599766128.134500
2018-04-01	54203175763.337590
2018-07-01	46154822207.093200