Quarter	US Dollars, sum over component sub-periods
2008-01-01	11066509300.319500
2008-04-01	19481207495.154400
2008-07-01	29433573011.198900
2008-10-01	-13399145927.930200
2009-01-01	-13603224261.205400
2009-04-01	21328052814.360302
2009-07-01	83743871604.863800
2009-10-01	13594485197.864700
2010-01-01	23335316734.701900
2010-04-01	4540671043.475630
2010-07-01	19417207754.063100
2010-10-01	-17639193118.618000
2011-01-01	23144940008.381702
2011-04-01	13774793607.277498
2011-07-01	-5954958927.335979
2011-10-01	14147344568.840600
2012-01-01	14639935394.563398
2012-04-01	-1777341378.498590
2012-07-01	7659625622.757850
2012-10-01	21952347590.214700
2013-01-01	5764476480.007040
2013-04-01	7011052721.854010
2013-07-01	-2715310545.829850
2013-10-01	9915849378.516350
2014-01-01	6848624690.243879
2014-04-01	6644292278.146870
2014-07-01	370071698.309283
2014-10-01	11399984951.138400
2015-01-01	21575732791.100100
2015-04-01	-1420165294.764470
2015-07-01	14729768551.051100
2015-10-01	6732627186.191590
2016-01-01	8296093045.359699
2016-04-01	5678947308.002300
2016-07-01	30168049619.500900
2016-10-01	19963982738.955600
2017-01-01	24991576202.553600
2017-04-01	-6207031128.627991
2017-07-01	16157819519.701399
2017-10-01	5331446258.077300
2018-01-01	19575406009.507500
2018-04-01	6132335643.571421