Quarter	US Dollars, sum over component sub-periods
1997-01-01	-342645815.604101000
1997-04-01	-1060588918.326920000
1997-07-01	12835271667.068300000
1997-10-01	1452072359.845330000
1998-01-01	-818621025.048866000
1998-04-01	-7584529694.517301000
1998-07-01	-8698292204.552720000
1998-10-01	-4227007126.310590300
1999-01-01	-8872275469.284340000
1999-04-01	43326758.530036800
1999-07-01	525382588.218486000
1999-10-01	271925741.567023040
2000-01-01	3033863434.902839700
2000-04-01	-1066492815.040290000
2000-07-01	2105582431.207290000
2000-10-01	-1045993577.568000100
2001-01-01	752882055.631631000
2001-04-01	519915817.354023040
2001-07-01	-1595669837.695170000
2001-10-01	-94044959.813714400
2002-01-01	-488282540.374329030
2002-04-01	-174726764.579479000
2002-07-01	2055908505.232600000
2002-10-01	1768825634.557610000
2003-01-01	4064360291.704440000
2003-04-01	669040118.745316000
2003-07-01	1150421476.638890000
2003-10-01	-4747710038.714690000
2004-01-01	-901358029.037752000
2004-04-01	2539453775.160050000
2004-07-01	-4071515298.889030000
2004-10-01	-410642529.587509000
2005-01-01	13104588.677609699
2005-04-01	-1020652383.682700000
2005-07-01	-510970874.910169960
2005-10-01	487637350.394993960
2006-01-01	-56536189.448703200
2006-04-01	158367515.717448000
2006-07-01	-354323491.231873000
2006-10-01	-316026480.709208000
2007-01-01	1429115685.368660000
2007-04-01	2566741842.583220000
2007-07-01	-508703942.734172050
2007-10-01	-1593978223.729200000
2008-01-01	-80903202.087220300
2008-04-01	3802049396.079540300
2008-07-01	2424706938.738420000
2008-10-01	2072500002.379299900
2009-01-01	-218577942.315767000
2009-04-01	980512471.831342100
2009-07-01	9303475986.219690000
2009-10-01	-1061734595.242800000
2010-01-01	204797722.712580980
2010-04-01	658215593.138293000
2010-07-01	245545329.939299000
2010-10-01	240245712.548508020
2011-01-01	2581321727.737090000
2011-04-01	-2992298825.508580000
2011-07-01	1094272239.166660000
2011-10-01	480995972.598504960
2012-01-01	470796507.067520000
2012-04-01	1199000136.288730000
2012-07-01	80086265.517064300
2012-10-01	134971572.532210000
2013-01-01	763987429.194972000
2013-04-01	1445752913.043680200
2013-07-01	-141732878.873991000
2013-10-01	-70777912.133375000
2014-01-01	-152124657.931856000
2014-04-01	-185119795.589596000
2014-07-01	86093988.511465300
2014-10-01	-965200973.420301000
2015-01-01	-436783070.173580000
2015-04-01	875989807.985564000
2015-07-01	60031660.987845600
2015-10-01	84259060.126898000
2016-01-01	-1908896039.026340000
2016-04-01	-165994960.186979000
2016-07-01	750981949.367278100
2016-10-01	33402785.254001997
2017-01-01	312208230.039576000
2017-04-01	2465699922.107750000
2017-07-01	55201058.160101704
2017-10-01	80071194.105010600
2018-01-01	173271744.081143000
2018-04-01	1377035742.806630000