Quarter	US Dollars, sum over component sub-periods
1999-01-01	3008312026.52860000
1999-04-01	2523519496.82263000
1999-07-01	1612851139.08190010
1999-10-01	5179043703.89101000
2000-01-01	2140389172.42738990
2000-04-01	1980762925.30688000
2000-07-01	119286214.98685099
2000-10-01	93904660.33029470
2001-01-01	2500380356.32564000
2001-04-01	2852109626.62778000
2001-07-01	-4146067271.01689000
2001-10-01	1680269948.67170000
2002-01-01	2465958323.29081960
2002-04-01	2719300225.58695030
2002-07-01	2015577285.75196000
2002-10-01	-652304476.09251090
2003-01-01	3625289145.55887030
2003-04-01	3442887266.41266000
2003-07-01	3041525273.85349000
2003-10-01	18107932673.97500000
2004-01-01	3826708636.45570000
2004-04-01	5112654444.34217000
2004-07-01	5912867262.89110000
2004-10-01	6105231047.14804900
2005-01-01	-106147168.28863800
2005-04-01	5816837629.32358000
2005-07-01	1281695440.40713000
2005-10-01	5603072091.97760000
2006-01-01	1947491291.86065000
2006-04-01	1665372685.12396000
2006-07-01	3301071375.14587000
2006-10-01	3775549016.47286000
2007-01-01	4360769513.33592000
2007-04-01	4050976490.00135000
2007-07-01	2958732120.98361000
2007-10-01	3158975025.20878030
2008-01-01	6984643113.53002000
2008-04-01	3777056466.60654000
2008-07-01	2564161326.68070000
2008-10-01	4072764580.08757970
2009-01-01	2678880852.54860000
2009-04-01	4092277747.01831000
2009-07-01	4475795873.44425000
2009-10-01	6207972515.16096000
2010-01-01	4930366797.46573000
2010-04-01	3533779082.08030030
2010-07-01	3385940865.47876000
2010-10-01	4674611491.62181000
2011-01-01	3809090219.00188000
2011-04-01	2956316396.14941020
2011-07-01	4675013398.55588000
2011-10-01	8946255624.80132100
2012-01-01	-8646131952.91410000
2012-04-01	4988353508.19590950
2012-07-01	5429598532.47722000
2012-10-01	8874380893.99280000
2013-01-01	716485620.12585500
2013-04-01	4888394899.29765000
2013-07-01	6021660442.62769000
2013-10-01	10974659721.75770000
2014-01-01	2713574979.32500030
2014-04-01	577299510.69051700
2014-07-01	2973553910.89600040
2014-10-01	7820250577.66022000
2015-01-01	1788784274.49953000
2015-04-01	992124820.40789200
2015-07-01	5963144991.45933100
2015-10-01	9537687896.96159000
2016-01-01	-611684354.30694000
2016-04-01	-258590788.31849200
2016-07-01	1380333835.61266020
2016-10-01	2887724660.66856000
2017-01-01	-19357975819.55280000
2017-04-01	-6078467203.16216000
2017-07-01	-4892927836.06347900
2017-10-01	1947614044.84835000
2018-01-01	3149613333.90048000
2018-04-01	1652204649.88996980