Quarter	US Dollars, sum over component sub-periods
1999-01-01	-47145188.4754482000
1999-04-01	15851253.1207452000
1999-07-01	-28314031.7003975000
1999-10-01	46704802.9409009000
2000-01-01	-103662759.7347210000
2000-04-01	-19611514.1119493020
2000-07-01	-17169985.4905316000
2000-10-01	77384396.0129280000
2001-01-01	10149145.3577793000
2001-04-01	5242848.5783598900
2001-07-01	-197898717.3007420000
2001-10-01	-8956662.8394013700
2002-01-01	28052138.7647729000
2002-04-01	-88282996.8401579100
2002-07-01	-25575895.2804055000
2002-10-01	-95044363.8478351000
2003-01-01	-51529132.0659832950
2003-04-01	23853722.4000877000
2003-07-01	-64162450.2626384050
2003-10-01	92812376.6966781000
2004-01-01	-32503895.6379772000
2004-04-01	-115703636.6470650000
2004-07-01	56243154.2789476000
2004-10-01	110109195.6307199900
2005-01-01	-165117817.3378820000
2005-04-01	2517021.9079721197
2005-07-01	-58536042.9491365000
2005-10-01	-30923344.1713899000
2006-01-01	-305536002.5525660000
2006-04-01	-72899332.6318411100
2006-07-01	-121081768.5864320100
2006-10-01	34827408.0781576040
2007-01-01	-98333648.0758249000
2007-04-01	-80884721.9301434000
2007-07-01	-252977095.8461830000
2007-10-01	-270976298.0339640000
2008-01-01	-292150451.9816289500
2008-04-01	-456120962.8821790000
2008-07-01	-427360221.1134500000
2008-10-01	-348043409.7785260000
2009-01-01	-183449344.4435900200
2009-04-01	-183846088.4683770000
2009-07-01	-72951610.5930510000
2009-10-01	48730516.8887516000
2010-01-01	-359779783.1437239600
2010-04-01	-214746013.9775510000
2010-07-01	19385157.6267868000
2010-10-01	462846259.7685939700
2011-01-01	-25977284.3363373000
2011-04-01	-179912146.7958499800
2011-07-01	-304984262.7870950000
2011-10-01	420366228.1533150000
2012-01-01	-388177621.4261449600
2012-04-01	-139776486.4764410000
2012-07-01	-97605136.0989221000
2012-10-01	3009606506.7518697000
2013-01-01	-3172065250.0599500000
2013-04-01	-168475271.7096970000
2013-07-01	-129811421.7724400200
2013-10-01	-694167984.3850241000
2014-01-01	-705803593.1072600000
2014-04-01	-216658723.7270819800
2014-07-01	56954484.7075848000
2014-10-01	-388327946.6154120000
2015-01-01	-310701359.1956400000
2015-04-01	-682431453.9483501000
2015-07-01	-234568156.8228780000
2015-10-01	-87541880.6513226000
2016-01-01	-80455779.9358678000
2016-04-01	-411035139.5106160000
2016-07-01	-949607190.0617430000
2016-10-01	-738093803.1932700000
2017-01-01	-279175959.9671290000
2017-04-01	-303538438.2255750300
2017-07-01	-291273668.5894730000
2017-10-01	-496912410.4752130000
2018-01-01	-587403501.2112490000
2018-04-01	-413348964.3199850000