Quarter	US Dollars, sum over component sub-periods
1998-01-01	10986550000.00000
1998-04-01	14155923000.00000
1998-07-01	2678617000.00000
1998-10-01	20109511000.00000
1999-01-01	5330796000.00000
1999-04-01	5303355000.00000
1999-07-01	20275204000.00000
1999-10-01	14300428500.00000
2000-01-01	16007079550.00000
2000-04-01	20383399330.00000
2000-07-01	21893076050.00000
2000-10-01	8351582859.00000
2001-01-01	24235667480.00000
2001-04-01	2296596936.00000
2001-07-01	24358014080.00000
2001-10-01	3161769157.00000
2002-01-01	9759694020.00000
2002-04-01	24504859990.00000
2002-07-01	19744143030.00000
2002-10-01	39188020450.00000
2003-01-01	28249232100.00000
2003-04-01	11623344500.00000
2003-07-01	30060946290.00000
2003-10-01	51237697290.00000
2004-01-01	22786388410.00000
2004-04-01	55398656460.00000
2004-07-01	44190828540.00000
2004-10-01	69245221870.00000
2005-01-01	65038189110.00000
2005-04-01	96526502550.00000
2005-07-01	60864856040.00000
2005-10-01	112765432200.00000
2006-01-01	77001121310.00000
2006-04-01	93447584000.00000
2006-07-01	108328000900.00000
2006-10-01	173149703100.00000
2007-01-01	142983794900.00000
2007-04-01	134258791200.00000
2007-07-01	150854999200.00000
2007-10-01	209052154500.00000
2008-01-01	210672353000.00000
2008-04-01	167877308900.00000
2008-07-01	128713124700.00000
2008-10-01	101398168900.00000
2009-01-01	77722152860.00000
2009-04-01	73726053310.00000
2009-07-01	124123191400.00000
2009-10-01	152773740500.00000
2010-01-01	109170453900.00000
2010-04-01	151660325700.00000
2010-07-01	195835591200.00000
2010-10-01	196930779000.00000
2011-01-01	171326983400.00000
2011-04-01	203298250400.00000
2011-07-01	152238371700.00000
2011-10-01	86714908960.00000
2012-01-01	135585722500.00000
2012-04-01	100142314700.00000
2012-07-01	55453060590.00000
2012-10-01	108404778900.00000
2013-01-01	201802060500.00000
2013-04-01	95090490080.00000
2013-07-01	154263715800.00000
2013-10-01	200509329900.00000
2014-01-01	189642180000.00000
2014-04-01	172882100400.00000
2014-07-01	119729493300.00000
2014-10-01	98380136530.00000
2015-01-01	-21054422549.00000
2015-04-01	128923648803.20001
2015-07-01	-98015661434.00000
2015-10-01	-20640734355.50000
2016-01-01	-15931311764.00000
2016-04-01	105108031763.00000
2016-07-01	92959716727.00000
2016-10-01	48682878259.00000
2017-01-01	52076750198.00000
2017-04-01	111280888141.59999
2017-07-01	109312119410.10000
2017-10-01	106579776229.30000
2018-01-01	98489022767.50000
2018-04-01	117466982224.00000