Quarter	US Dollars, sum over component sub-periods
1996-01-01	2799108946.116400200
1996-04-01	1034464072.089200000
1996-07-01	524805129.856994000
1996-10-01	3463683111.528400000
1997-01-01	5008966121.604239000
1997-04-01	2121931225.267409800
1997-07-01	2820776045.846020000
1997-10-01	1775131762.707949900
1998-01-01	4298856783.055320000
1998-04-01	2755277497.380560000
1998-07-01	4969069232.232600000
1998-10-01	3030561643.621330000
1999-01-01	4421545176.304530000
1999-04-01	1624225069.772360000
1999-07-01	2679346333.130200000
1999-10-01	-275039395.096416000
2000-01-01	7903051349.299459000
2000-04-01	5994586146.885840000
2000-07-01	2289933854.368790000
2000-10-01	7812346046.923130000
2001-01-01	4592949599.184140000
2001-04-01	3986312535.746300000
2001-07-01	-521489863.157360000
2001-10-01	6688835808.464940000
2002-01-01	5549940328.743039000
2002-04-01	8109161105.588670000
2002-07-01	1346669255.341350000
2002-10-01	-2961382284.100970300
2003-01-01	6370288951.657190000
2003-04-01	9954953481.636591000
2003-07-01	5702578474.219760000
2003-10-01	-6809810664.552421000
2004-01-01	16421968196.171800000
2004-04-01	4162920426.864179600
2004-07-01	-970805749.945313000
2004-10-01	-2901701155.444860000
2005-01-01	7928276149.953850000
2005-04-01	4496659638.592200000
2005-07-01	4465812276.661200000
2005-10-01	-549484038.737774000
2006-01-01	20306115193.267200000
2006-04-01	5539092394.974550000
2006-07-01	-6523120964.477440000
2006-10-01	7396309552.598360000
2007-01-01	5909196691.703239000
2007-04-01	7094938191.972410000
2007-07-01	9266661010.887339000
2007-10-01	2863364518.262630000
2008-01-01	4502113375.409200000
2008-04-01	4103526607.847550000
2008-07-01	-3106983782.972170000
2008-10-01	-13517218012.983300000
2009-01-01	-1242511517.330700000
2009-04-01	-7141399169.838280000
2009-07-01	11409059727.258300000
2009-10-01	3372742441.633599800
2010-01-01	16213614304.211600000
2010-04-01	28049133210.298603000
2010-07-01	-4218210299.588800000
2010-10-01	-6099797921.994310000
2011-01-01	-835374775.236952100
2011-04-01	13031396616.717001000
2011-07-01	6627759858.901031000
2011-10-01	1137144540.260890000
2012-01-01	18702030605.264400000
2012-04-01	14614978131.853200000
2012-07-01	-4233309941.316070000
2012-10-01	-5071816398.614190000
2013-01-01	-4548298218.367990000
2013-04-01	-13060098.582147101
2013-07-01	-9828579077.056200000
2013-10-01	-3297978482.676299600
2014-01-01	2216086233.115420000
2014-04-01	3769587541.302210000
2014-07-01	-13080988162.142000000
2014-10-01	7048589256.090040000
2015-01-01	-6183632485.730610000
2015-04-01	4044816575.509100000
2015-07-01	-12295373528.251300000
2015-10-01	2220280948.019170000
2016-01-01	589641674.872456000
2016-04-01	4125031221.517250000
2016-07-01	-1516470236.538080000
2016-10-01	7786081491.787700000
2017-01-01	2919626451.564630000
2017-04-01	-2323828695.545800000
2017-07-01	-6299967573.846500000
2017-10-01	-3833997176.557570000
2018-01-01	4833175670.008039000
2018-04-01	3422338831.387080000