Quarter	US Dollars, sum over component sub-periods
1999-01-01	-15888169.282287499
1999-04-01	-127141285.946628000
1999-07-01	99688143.213256300
1999-10-01	78376642.934583200
2000-01-01	34860657.577354700
2000-04-01	52476580.261193200
2000-07-01	73014601.238489100
2000-10-01	106840660.308592000
2001-01-01	49180963.316494904
2001-04-01	121101127.191026000
2001-07-01	77154375.311725600
2001-10-01	52802628.054130405
2002-01-01	46185785.938411600
2002-04-01	50422977.226510495
2002-07-01	16115088.856435400
2002-10-01	58181532.188119300
2003-01-01	-71054798.917595210
2003-04-01	10306872.704436801
2003-07-01	28399530.628399402
2003-10-01	83467733.897471200
2004-01-01	7786485.193936970
2004-04-01	14344667.609161000
2004-07-01	81591863.807207400
2004-10-01	107541222.609280000
2005-01-01	79534351.411460090
2005-04-01	226975882.408335000
2005-07-01	194914107.423555020
2005-10-01	221890570.548974000
2006-01-01	46396302.926491600
2006-04-01	-41713827.568863004
2006-07-01	277812477.366917000
2006-10-01	444836914.183052000
2007-01-01	60509178.654617995
2007-04-01	322419831.960397000
2007-07-01	392288619.021053970
2007-10-01	316298751.989159000
2008-01-01	38479094.795361800
2008-04-01	157992269.861996000
2008-07-01	126848607.870712000
2008-10-01	925063997.673991100
2009-01-01	298113272.732239960
2009-04-01	527823266.218106030
2009-07-01	612415051.478266000
2009-10-01	872706069.508675000
2010-01-01	694753239.048140000
2010-04-01	691951106.817940000
2010-07-01	690249105.720885000
2010-10-01	580837031.437596000
2011-01-01	712770133.940635000
2011-04-01	622098886.713627900
2011-07-01	1040545871.544949900
2011-10-01	934545088.885699000
2012-01-01	545738453.524838000
2012-04-01	630819628.973422000
2012-07-01	633506895.184164000
2012-10-01	1408500567.783040000
2013-01-01	791733689.573295000
2013-04-01	1058795366.272170000
2013-07-01	807015278.921590100
2013-10-01	2167518726.928920000
2014-01-01	456022999.613546000
2014-04-01	852447417.023932900
2014-07-01	1212040742.785650000
2014-10-01	2604556763.208319700
2015-01-01	888761041.973256100
2015-04-01	1573931458.792650000
2015-07-01	796329097.803049000
2015-10-01	2510756512.207970000
2016-01-01	107242731.825814010
2016-04-01	59121619.382549200
2016-07-01	154654332.537896000
2016-10-01	-26653683.850253098
2017-01-01	312478079.109581000
2017-04-01	574313192.803804000
2017-07-01	215870852.966054000
2017-10-01	311386427.458081960
2018-01-01	1359222999.529850000
2018-04-01	445555340.780477050