Quarter	US Dollars, sum over component sub-periods
1996-01-01	5175785371.45078000
1996-04-01	206380068.90503200
1996-07-01	3267629950.32850000
1996-10-01	1404932138.49635000
1997-01-01	5748132282.54391000
1997-04-01	2695143331.59992030
1997-07-01	7605355772.40536000
1997-10-01	2375428686.87922000
1998-01-01	5352585833.85110000
1998-04-01	521965220.25519500
1998-07-01	11355809517.44190000
1998-10-01	2975169717.89096980
1999-01-01	2014895555.08165000
1999-04-01	1850369614.29499000
1999-07-01	5436294086.47631100
1999-10-01	853141067.05378900
2000-01-01	9444171044.02231000
2000-04-01	2885694219.32968000
2000-07-01	1455834032.90770000
2000-10-01	9988673498.83727000
2001-01-01	5649383365.97118000
2001-04-01	6086947199.47584000
2001-07-01	1973638559.02632000
2001-10-01	8021587238.96787000
2002-01-01	5300977597.20568000
2002-04-01	7810286376.70272100
2002-07-01	3117308159.36943000
2002-10-01	-1012472591.72641000
2003-01-01	5064884272.65228000
2003-04-01	14764318274.11140000
2003-07-01	10278374269.26580000
2003-10-01	3601834157.19032000
2004-01-01	16676998761.94680000
2004-04-01	6574618103.22643000
2004-07-01	-1357171766.29634000
2004-10-01	-498729886.09208600
2005-01-01	6232542375.07115900
2005-04-01	6019457892.91534000
2005-07-01	9229182771.64718000
2005-10-01	1272614548.59181000
2006-01-01	14905104754.44430200
2006-04-01	6958115611.20470000
2006-07-01	-2680367993.02385000
2006-10-01	14208292591.88539900
2007-01-01	5660084783.24448000
2007-04-01	18641232247.50040000
2007-07-01	7383081547.25000000
2007-10-01	2872058944.93752000
2008-01-01	4031676237.34648000
2008-04-01	15956423410.41600000
2008-07-01	349385724.62959200
2008-10-01	-7951150199.24224000
2009-01-01	6665326181.45044000
2009-04-01	4912095119.29952000
2009-07-01	11450542015.63480000
2009-10-01	8824653603.85393100
2010-01-01	22410129184.66390000
2010-04-01	4864187819.56252000
2010-07-01	-4675700019.58097000
2010-10-01	-11219610508.05630000
2011-01-01	-11101870990.05570000
2011-04-01	-6456687124.20948000
2011-07-01	-1676001481.14945000
2011-10-01	-2330876842.00396000
2012-01-01	3396554187.47877030
2012-04-01	-2699353248.00833000
2012-07-01	-8043664292.87015100
2012-10-01	2303601358.12185000
2013-01-01	1951532655.92291000
2013-04-01	822786210.67526600
2013-07-01	-13605031765.55850000
2013-10-01	5870483365.98551000
2014-01-01	13545947018.00420000
2014-04-01	10712265504.78460000
2014-07-01	4345759635.47874000
2014-10-01	389576589.53057396
2015-01-01	-791387882.29903900
2015-04-01	-1660177653.77062000
2015-07-01	-7552872310.21154000
2015-10-01	3730378389.25448040
2016-01-01	-3408900374.54300000
2016-04-01	4759651409.44298100
2016-07-01	4570612280.25018000
2016-10-01	2296172108.91220000
2017-01-01	6964481199.79068000
2017-04-01	2425008174.95432000
2017-07-01	3238070581.85958000
2017-10-01	2393893200.22775030
2018-01-01	4684481478.27883000
2018-04-01	1662925516.39971000