Quarter	US Dollars, sum over component sub-periods
1999-01-01	2408063090.9537500
1999-04-01	3299624701.0929700
1999-07-01	1468214594.9941201
1999-10-01	4452341680.4785200
2000-01-01	2884976839.2866497
2000-04-01	2637612431.8397000
2000-07-01	9833060489.2787000
2000-10-01	3795659651.5397400
2001-01-01	2750836882.0751896
2001-04-01	2635601744.4674897
2001-07-01	14568663095.5256000
2001-10-01	3212319904.8855400
2002-01-01	2204906841.9711600
2002-04-01	1670891939.1948100
2002-07-01	1730225894.6036100
2002-10-01	3362760299.3743000
2003-01-01	3021186901.2663200
2003-04-01	2273736696.4817600
2003-07-01	2405134848.0234003
2003-10-01	7610942437.2563600
2004-01-01	3871490239.4059200
2004-04-01	3307595292.2391100
2004-07-01	7306770717.5821000
2004-10-01	4974384018.3016300
2005-01-01	4033160016.0753503
2005-04-01	4183903426.5043400
2005-07-01	19319006959.8833000
2005-10-01	6456683767.1342000
2006-01-01	4205910157.9672200
2006-04-01	4071186127.6826300
2006-07-01	4410873131.5696000
2006-10-01	5506243868.8404300
2007-01-01	4012750413.1685100
2007-04-01	5934814374.2284600
2007-07-01	4760305820.8637905
2007-10-01	6781794527.7144400
2008-01-01	6319615021.5196500
2008-04-01	4950747796.4367100
2008-07-01	9547851957.2171300
2008-10-01	5969303916.2466600
2009-01-01	6456585686.8475400
2009-04-01	5527394847.6579600
2009-07-01	5416303083.9128400
2009-10-01	11649857156.5491000
2010-01-01	8419756077.6603100
2010-04-01	5203154206.9213705
2010-07-01	4781102285.9900010
2010-10-01	9321913105.1403300
2011-01-01	7590873777.7805195
2011-04-01	6620420455.1869100
2011-07-01	13835743484.8793000
2011-10-01	16945964984.9447020
2012-01-01	8512911865.0256300
2012-04-01	7338352976.1344190
2012-07-01	7950470061.5884100
2012-10-01	24136640796.5853000
2013-01-01	7288796873.1911590
2013-04-01	8435307144.9874500
2013-07-01	6489719664.7893000
2013-10-01	15820840094.6530000
2014-01-01	9952946247.3156800
2014-04-01	7886654626.9622200
2014-07-01	7204400998.9196100
2014-10-01	14526963150.8310000
2015-01-01	9940797438.2626400
2015-04-01	6711536724.6203390
2015-07-01	6788864064.6849300
2015-10-01	15251137502.9426000
2016-01-01	11182026837.7104000
2016-04-01	8733930519.2431010
2016-07-01	6141494635.6488000
2016-10-01	11895825725.8879000
2017-01-01	8945197415.9455900
2017-04-01	5702996949.3281590
2017-07-01	32419947130.9878000
2017-10-01	13510788626.6866020
2018-01-01	14611479759.8069000