Quarter	US Dollars, sum over component sub-periods
2008-01-01	493359513574.31903
2008-04-01	281533060678.28400
2008-07-01	362090320404.12700
2008-10-01	212185603622.01900
2009-01-01	146873723799.89800
2009-04-01	113293555103.59000
2009-07-01	275467241681.41400
2009-10-01	296195584046.13403
2010-01-01	231580659307.20200
2010-04-01	234632571251.31800
2010-07-01	295653606954.48400
2010-10-01	400852351280.46000
2011-01-01	387039403458.88400
2011-04-01	347850475794.08100
2011-07-01	294594580676.72797
2011-10-01	409919760855.89600
2012-01-01	333705709409.29700
2012-04-01	346601548264.91797
2012-07-01	399721829406.06800
2012-10-01	253954623144.72800
2013-01-01	330440687377.60500
2013-04-01	517431360554.46300
2013-07-01	323898073219.30700
2013-10-01	557235074385.28600
2014-01-01	249340507880.31500
2014-04-01	191460861968.40600
2014-07-01	406026786949.61694
2014-10-01	297246398124.28595
2015-01-01	597930813745.09100
2015-04-01	394878198277.30695
2015-07-01	339634163670.97900
2015-10-01	543791695238.15405
2016-01-01	467653024702.27100
2016-04-01	405124790160.88700
2016-07-01	255325432154.48400
2016-10-01	294781823446.43900
2017-01-01	350350208106.35596
2017-04-01	206056420101.12000
2017-07-01	93884111255.93361
2017-10-01	233907943816.67902