Quarter	US Dollars, sum over component sub-periods
2002-01-01	5757701481.4696410
2002-04-01	1310450734.3460900
2002-07-01	2514307243.7198696
2002-10-01	2658240786.7757700
2003-01-01	3545848400.2904800
2003-04-01	2138883775.2078598
2003-07-01	1445343616.4425900
2003-10-01	2183470656.9026200
2004-01-01	4171749990.1511500
2004-04-01	9175539435.3552400
2004-07-01	5365107847.3048310
2004-10-01	-1857606900.4053300
2005-01-01	18443398104.8679000
2005-04-01	11082447460.8013000
2005-07-01	5745068715.2787895
2005-10-01	-1175087078.5128100
2006-01-01	7894617262.8050900
2006-04-01	-2000960992.2395000
2006-07-01	13492332655.3259000
2006-10-01	1688484339.7892000
2007-01-01	20037775247.2378000
2007-04-01	5443541785.8986500
2007-07-01	12551238630.3250000
2007-10-01	12246099971.5777000
2008-01-01	5769596874.7756600
2008-04-01	20072446483.0000000
2008-07-01	8205316245.3782410
2008-10-01	9612564966.6755800
2009-01-01	7517519944.6458400
2009-04-01	20318397332.9494970
2009-07-01	19565335876.3089030
2009-10-01	-3541084227.2492800
2010-01-01	9481581054.2338400
2010-04-01	10053671376.2745000
2010-07-01	-19152535735.2653000
2010-10-01	-16620388418.9630990
2011-01-01	-6127904652.3928300
2011-04-01	10128334216.0192010
2011-07-01	2784393362.1118097
2011-10-01	-6321661354.1517800
2012-01-01	1163221453.3952398
2012-04-01	40823710522.7291950
2012-07-01	-10520081784.4056000
2012-10-01	20693478115.6354000
2013-01-01	-28775540338.3142000
2013-04-01	5278891846.9038500
2013-07-01	-4077138328.7303200
2013-10-01	-2538477040.9373900
2014-01-01	-1813161463.4580700
2014-04-01	759676790.7898971
2014-07-01	707295228.6941920
2014-10-01	6107112498.0578190
2015-01-01	9745440820.8574400
2015-04-01	12071405005.4980000
2015-07-01	1464105509.6480100
2015-10-01	5116822924.0698000
2016-01-01	1897874699.3091000
2016-04-01	-8742401236.5142500
2016-07-01	-868148523.9342381
2016-10-01	-2774586194.4856500
2017-01-01	-1239242906.2663000
2017-04-01	-5973988392.9033510
2017-07-01	-12185339966.1927000
2017-10-01	-15558539525.1398010
2018-01-01	-5619657345.2699600
2018-04-01	-6293148641.2175200