Quarter	US Dollars, sum over component sub-periods
2002-01-01	2071212133.1102798
2002-04-01	10886397047.8520010
2002-07-01	10860803930.8242000
2002-10-01	7630361623.1017810
2003-01-01	18364445906.5240970
2003-04-01	14737852001.1627000
2003-07-01	6046579260.1892800
2003-10-01	25840988506.2063000
2004-01-01	28303017156.7351000
2004-04-01	16886343145.5315000
2004-07-01	5598883740.7425400
2004-10-01	7627717372.1455200
2005-01-01	40787245983.7393950
2005-04-01	26756949690.5069000
2005-07-01	36849048786.9287950
2005-10-01	31326774876.8874000
2006-01-01	-974948543.5781691
2006-04-01	44357735644.4209000
2006-07-01	20880487265.4835000
2006-10-01	83393325710.3463000
2007-01-01	41604310943.2277000
2007-04-01	66984008427.0988000
2007-07-01	58665526014.2818000
2007-10-01	43763831389.3751000
2008-01-01	89804052524.2605900
2008-04-01	1166857394.7705100
2008-07-01	-8578694122.7720910
2008-10-01	24260595718.5997000
2009-01-01	-4808714730.9468700
2009-04-01	-35956209435.7818000
2009-07-01	-8852892509.0273100
2009-10-01	-27546032183.1143000
2010-01-01	19607998181.3330000
2010-04-01	10689014612.8944000
2010-07-01	-1501703544.1550798
2010-10-01	2312873978.4330900
2011-01-01	-21500988077.5390000
2011-04-01	2351811582.9153600
2011-07-01	8083494928.0375805
2011-10-01	1420083347.6717800
2012-01-01	-79879348306.3781000
2012-04-01	13396742699.2603000
2012-07-01	-1074907844.9868500
2012-10-01	-42231826363.1792000
2013-01-01	22131884542.1196000
2013-04-01	-15934626280.0776000
2013-07-01	-15475375924.1574000
2013-10-01	-39406963693.9514000
2014-01-01	52458338123.0420000
2014-04-01	8407181235.2578600
2014-07-01	10221343220.6612000
2014-10-01	12588817870.6642990
2015-01-01	60482072193.8556000
2015-04-01	-11461972702.2152000
2015-07-01	-14428720888.1712990
2015-10-01	97892613764.8333000
2016-01-01	-6707587351.9135800
2016-04-01	11749507215.9559000
2016-07-01	-17235761054.8691980
2016-10-01	382515766.6184100
2017-01-01	3043231075.0615300
2017-04-01	42734032949.7506940
2017-07-01	13050939537.7670000
2017-10-01	36697334768.8626000
2018-01-01	8705369043.0554200
2018-04-01	57727101325.3913000