Quarter	US Dollars, monthly level
1999-01-01	-243026060.62452200
1999-04-01	-317090950.77730800
1999-07-01	-358525551.24210900
1999-10-01	-468455217.83664200
2000-01-01	-287543159.30560800
2000-04-01	-402324192.57549000
2000-07-01	-443997289.67030700
2000-10-01	-532306162.66487896
2001-01-01	-358748119.33332200
2001-04-01	-423456037.82729703
2001-07-01	-501933762.04377306
2001-10-01	-596006082.72246000
2002-01-01	-402804374.83804697
2002-04-01	-527888047.21659200
2002-07-01	-536242168.74544597
2002-10-01	-658448325.00288400
2003-01-01	-506667991.98779100
2003-04-01	-603577396.97655600
2003-07-01	-699091504.31709300
2003-10-01	-742130577.70261700
2004-01-01	-650017544.81646410
2004-04-01	-829711641.80299800
2004-07-01	-830750699.88833310
2004-10-01	-918286358.45249700
2005-01-01	-700176695.65384300
2005-04-01	-816562097.85861100
2005-07-01	-888780506.86288000
2005-10-01	-1110360523.33070000
2006-01-01	-997576092.88786400
2006-04-01	-1226906334.18647000
2006-07-01	-1450863835.67178000
2006-10-01	-1730884016.49670000
2007-01-01	-1565612242.55084010
2007-04-01	-1746588772.27218000
2007-07-01	-1899245232.56061000
2007-10-01	-1800157011.68396000
2008-01-01	-1626309703.50903990
2008-04-01	-1676598717.01436000
2008-07-01	-1533064915.60259990
2008-10-01	-1175748820.01937000
2009-01-01	-702498868.72552410
2009-04-01	-456313321.94724400
2009-07-01	-519387206.50310100
2009-10-01	-407135510.17159600
2010-01-01	-439356383.15915596
2010-04-01	-387660123.49752300
2010-07-01	-577548404.43086400
2010-10-01	-758740259.43470000
2011-01-01	-616869845.36665200
2011-04-01	-681219110.54525400
2011-07-01	-982492268.31556800
2011-10-01	-904440654.05494100
2012-01-01	-847663402.26746190
2012-04-01	-931916818.91177100
2012-07-01	-708552396.84095800
2012-10-01	-630578570.23140600
2013-01-01	-889226261.42248890
2013-04-01	-799859543.65440900
2013-07-01	-960079281.69638700
2013-10-01	-745465499.70434390
2014-01-01	-772683622.90072500
2014-04-01	-815898358.33933000
2014-07-01	-828091717.19027900
2014-10-01	-679261745.84818100
2015-01-01	-611721444.15547300
2015-04-01	-627571486.17551590
2015-07-01	-678024259.93494500
2015-10-01	-435958565.64358700
2016-01-01	-471382699.70644800
2016-04-01	-567883438.62606800
2016-07-01	-502700398.49919504
2016-10-01	-560520286.74618900
2017-01-01	-586695738.77061590
2017-04-01	-740259865.10737190
2017-07-01	-943585747.35799410
2017-10-01	-604537515.49282990
2018-01-01	-657941076.46130300
2018-04-01	-802873780.84054590