Quarter	Millions of US Dollars
2009-04-01	-0.35400000000000000
2009-07-01	-0.23199999999999998
2009-10-01	227.35200000000000000
2010-01-01	265.46500000000000000
2010-04-01	451.74000000000000000
2010-07-01	-0.02300000000000000
2010-10-01	-275.14700000000000000
2011-01-01	-203.11599999999999000
2011-04-01	-69.31200000000000000
2011-07-01	-45.76500000000000000
2011-10-01	-83.94400000000000000
2012-01-01	-0.04700000000000000
2012-04-01	-71.23800000000000000
2012-07-01	-0.02400000000000000
2012-10-01	-268.23500000000000000
2013-01-01	0.00000000000000000
2013-04-01	0.00000000000000000
2013-07-01	0.00000000000000000
2013-10-01	-270.01900000000000000
2014-01-01	0.00000000000000000
2014-04-01	0.00000000000000000
2014-07-01	0.00000000000000000
2014-10-01	-278.79100000000000000
2015-01-01	0.00000000000000000
2015-04-01	-250.98400000000000000
2015-07-01	0.00000000000000000
2015-10-01	0.00000000000000000
2016-01-01	0.00000000000000000
2016-04-01	0.00000000000000000
2016-07-01	0.00000000000000000
2016-10-01	-127.45700000000001000
2017-01-01	0.00000000000000000
2017-04-01	-370.21800000000000000
2017-07-01	0.00000000000000000
2017-10-01	0.00000000000000000