Quarter	US Dollars, sum over component sub-periods
1999-01-01	65105260.275618900
1999-04-01	376203074.065686000
1999-07-01	175127529.406162020
1999-10-01	564609173.330002100
2000-01-01	440319912.777958000
2000-04-01	268957907.821019000
2000-07-01	131034099.796162000
2000-10-01	556472061.216561000
2001-01-01	41519231.009097290
2001-04-01	233306761.737015000
2001-07-01	-16045841.943303400
2001-10-01	-772960003.040338000
2002-01-01	161299797.897443980
2002-04-01	216109419.348303000
2002-07-01	-168210695.882667000
2002-10-01	-107049967.702299000
2003-01-01	-8004191847.582740000
2003-04-01	-606566083.887944100
2003-07-01	-47277594.930365200
2003-10-01	292715957.274139000
2004-01-01	-27503296.309057600
2004-04-01	-342289925.080899000
2004-07-01	363135148.279292050
2004-10-01	553136782.756677000
2005-01-01	-19656883.016414500
2005-04-01	417825636.723373000
2005-07-01	87804064.423704700
2005-10-01	-537590444.825701000
2006-01-01	307941797.848256000
2006-04-01	-111862769.038515000
2006-07-01	428247097.316221000
2006-10-01	349563984.784471040
2007-01-01	494290470.994480000
2007-04-01	114586689.401036000
2007-07-01	60494522.919739306
2007-10-01	228953235.772012000
2008-01-01	367060824.284611000
2008-04-01	215564016.704592020
2008-07-01	-44985286.432994700
2008-10-01	51221482.948537700
2009-01-01	-52042367.218039800
2009-04-01	315942907.590099040
2009-07-01	195968051.985254970
2009-10-01	0.000000000
2010-01-01	222786711.869768000
2010-04-01	213475327.504311000
2010-07-01	-527276287.448600000
2010-10-01	289109247.304136000
2011-01-01	73830176.534853400
2011-04-01	57571886.974672094
2011-07-01	-724337624.119350100
2011-10-01	351652517.782100000
2012-01-01	-841925787.012112000
2012-04-01	-765564792.903074000
2012-07-01	-2052210553.874770200
2012-10-01	-707302952.212060900
2013-01-01	-354944073.322016000
2013-04-01	463633499.666220960
2013-07-01	-287439576.781832000
2013-10-01	156528074.910349000
2014-01-01	-947010257.936149000
2014-04-01	-818640873.829546000
2014-07-01	214572709.828575020
2014-10-01	-61183502.842942804
2015-01-01	745232970.244614000
2015-04-01	-1318408902.927770000
2015-07-01	162307824.152323000
2015-10-01	-792254019.894469000
2016-01-01	209405454.627601000
2016-04-01	677530449.742773000
2016-07-01	353731467.978346000
2016-10-01	287694956.865114030
2017-01-01	858839021.883611100
2017-04-01	36292639.353057900
2017-07-01	102180682.126145990
2017-10-01	856055266.387393000
2018-01-01	1059292506.368400000
2018-04-01	331155654.411976000