Quarter	US Dollars, sum over component sub-periods
1993-01-01	14203694525.58290000
1993-04-01	35046034561.93790000
1993-07-01	9935154303.56790000
1993-10-01	12782338811.69559900
1994-01-01	-10721524797.76960000
1994-04-01	-2294504837.58514000
1994-07-01	-1780859739.84461000
1994-10-01	5638632036.42491100
1995-01-01	9169975026.31799100
1995-04-01	3497832469.29595000
1995-07-01	9862202784.35945000
1995-10-01	14636619793.19030000
1996-01-01	-4124978170.92771050
1996-04-01	-6246179441.19732000
1996-07-01	7072732999.83618000
1996-10-01	1615247213.42821000
1997-01-01	-5069216173.50885000
1997-04-01	1618169319.00832990
1997-07-01	5859112915.64039000
1997-10-01	-830356623.81168290
1998-01-01	16448741516.33850100
1998-04-01	7390994771.82472000
1998-07-01	12184226445.70010000
1998-10-01	-14225960286.81900000
1999-01-01	23114612406.81970000
1999-04-01	-9063746534.44210000
1999-07-01	1736593944.29104020
1999-10-01	8630009698.96868100
2000-01-01	-298153842.28462696
2000-04-01	-1812664232.91874000
2000-07-01	14723714399.85430000
2000-10-01	5856868444.30431000
2001-01-01	5182522679.51332000
2001-04-01	-10229671384.47650000
2001-07-01	-2851702687.59042000
2001-10-01	-2811496465.28808980
2002-01-01	-337502294.51367396
2002-04-01	11329651261.15360000
2002-07-01	4926310906.31811000
2002-10-01	7981725629.24241000
2003-01-01	2118062032.62886000
2003-04-01	3825682716.35692020
2003-07-01	-4820063368.85294000
2003-10-01	12447567597.74300000
2004-01-01	13329097511.23510000
2004-04-01	21179791737.48820000
2004-07-01	4651064323.41558000
2004-10-01	13531772441.86470000
2005-01-01	15086002485.66429900
2005-04-01	13164024578.69420000
2005-07-01	1725593766.10475020
2005-10-01	12176661447.18040000
2006-01-01	33755713793.81929800
2006-04-01	29999332263.04800000
2006-07-01	12178276829.93000000
2006-10-01	20736496750.53560000
2007-01-01	48710555910.84060000
2007-04-01	15250814319.92850100
2007-07-01	-1392748902.67490980
2007-10-01	-14563164680.43500000
2008-01-01	8430413298.97757000
2008-04-01	61153012246.14530000
2008-07-01	-325393571.86532800
2008-10-01	-42922289339.51700600
2009-01-01	-16298368353.50960000
2009-04-01	2595634404.59797000
2009-07-01	10925576504.11220000
2009-10-01	10893485548.13090100
2010-01-01	-10167930179.00030000
2010-04-01	16321967748.76710000
2010-07-01	-10695437634.61920000
2010-10-01	27700194924.80190300
2011-01-01	14789278140.32420200
2011-04-01	17107486214.52380000
2011-07-01	3524262592.20643000
2011-10-01	11807979562.61430000
2012-01-01	32374800473.47040000
2012-04-01	48511417278.93350000
2012-07-01	-31591529050.68450000
2012-10-01	14126591990.51060100
2013-01-01	-4645940825.89896000
2013-04-01	-7334551363.73380000
2013-07-01	-31136196736.56110000
2013-10-01	9100406163.91818000
2014-01-01	5924638704.85958000
2014-04-01	34325323875.54640000
2014-07-01	-4480860971.29673000
2014-10-01	-12647504087.67689900
2015-01-01	16505446842.48720000
2015-04-01	-7182674006.38668000
2015-07-01	12469910024.08640100
2015-10-01	2345028127.94730000
2016-01-01	1178181215.77319000
2016-04-01	19355915731.73480000
2016-07-01	1044456321.85404000
2016-10-01	567847349.31803400
2017-01-01	17291860604.37620000
2017-04-01	-1061284756.83942000
2017-07-01	381709444.72410800
2017-10-01	25707563377.94990000
2018-01-01	7214740492.91054900
2018-04-01	27198838335.21100000