Quarter	US Dollars, sum over component sub-periods
1999-01-01	560129739.267825000
1999-04-01	1182503482.807590000
1999-07-01	160446179.635586000
1999-10-01	1060717969.013350000
2000-01-01	460065200.346477030
2000-04-01	243743103.962798000
2000-07-01	657881549.321420100
2000-10-01	1574642035.723740000
2001-01-01	409656412.623094000
2001-04-01	95245082.506871400
2001-07-01	145304013.153247000
2001-10-01	477390129.340092960
2002-01-01	405879382.752808000
2002-04-01	-411067704.036985000
2002-07-01	-11804259.360187199
2002-10-01	136063510.350585000
2003-01-01	303807174.472359960
2003-04-01	-396426148.458600000
2003-07-01	73167706.439850900
2003-10-01	2781991496.369660000
2004-01-01	138766631.377518000
2004-04-01	303722046.198545000
2004-07-01	152834658.366705000
2004-10-01	1619252876.922360000
2005-01-01	-108768086.024160000
2005-04-01	200103241.683784000
2005-07-01	1254866420.722110000
2005-10-01	206948534.070070980
2006-01-01	-346434522.579288000
2006-04-01	233780618.440042000
2006-07-01	1588082985.880990000
2006-10-01	1007415026.260780000
2007-01-01	182245027.767196000
2007-04-01	550016109.124975000
2007-07-01	1170019068.288590000
2007-10-01	1346187063.494930000
2008-01-01	-152817159.498083000
2008-04-01	153081693.022101000
2008-07-01	374877386.941623000
2008-10-01	806410013.600056000
2009-01-01	-273222427.894709050
2009-04-01	99413070.060677690
2009-07-01	-78673305.541525590
2009-10-01	1039584360.293370100
2010-01-01	-119004082.116770000
2010-04-01	12706864.732399500
2010-07-01	-78832974.348932890
2010-10-01	351545986.158551000
2011-01-01	-179106539.371589000
2011-04-01	-909635814.199819900
2011-07-01	-145432310.495698000
2011-10-01	2624594270.649540000
2012-01-01	-85241707.407768310
2012-04-01	33341180.260435402
2012-07-01	116375354.579484000
2012-10-01	2686453414.823790000
2013-01-01	29028883.320016198
2013-04-01	-175005321.000771020
2013-07-01	160277367.698625000
2013-10-01	3251700617.050630000
2014-01-01	-91822991.724633890
2014-04-01	24682639.411946100
2014-07-01	458284923.461030960
2014-10-01	4154234978.744300000
2015-01-01	38274805.118303396
2015-04-01	197982544.986635980
2015-07-01	316833766.324741000
2015-10-01	5019432581.845210000
2016-01-01	-279942028.817950960
2016-04-01	-457333053.576371970
2016-07-01	-13390465.664795400
2016-10-01	-516126907.634418000
2017-01-01	-89506796.325339200
2017-04-01	-466305426.839290000
2017-07-01	-138589890.699830000
2017-10-01	927883837.569829000
2018-01-01	-153609702.199594020
2018-04-01	-567014717.626261000