Quarter	Millions of US Dollars
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	10
2006-01-01	0
2006-04-01	0
2006-07-01	66
2006-10-01	0
2007-01-01	0
2007-04-01	-10
2007-07-01	545
2007-10-01	501
2008-01-01	-691
2008-04-01	16
2008-07-01	39
2008-10-01	32
2009-01-01	-75
2009-04-01	-16
2009-07-01	36
2009-10-01	35
2010-01-01	142
2010-04-01	71
2010-07-01	239
2010-10-01	968
2011-01-01	1941
2011-04-01	2997
2011-07-01	1091
2011-10-01	637
2012-01-01	2628
2012-04-01	3172
2012-07-01	744
2012-10-01	670
2013-01-01	1108
2013-04-01	-52
2013-07-01	290
2013-10-01	1412
2014-01-01	188
2014-04-01	669
2014-07-01	1460
2014-10-01	295
2015-01-01	-374
2015-04-01	-141
2015-07-01	567
2015-10-01	362
2016-01-01	862
2016-04-01	-152
2016-07-01	-30
2016-10-01	142
2017-01-01	760
2017-04-01	527
2017-07-01	3239
2017-10-01	2347
2018-01-01	2312