Quarter	Millions of US Dollars
2006-10-01	92
2007-01-01	93
2007-04-01	95
2007-07-01	99
2007-10-01	0
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	0
2009-04-01	16
2009-07-01	17
2009-10-01	17
2010-01-01	20
2010-04-01	3
2010-07-01	3
2010-10-01	3
2011-01-01	0
2011-04-01	0
2011-07-01	0
2011-10-01	217
2012-01-01	238
2012-04-01	213
2012-07-01	225
2012-10-01	0
2013-01-01	0
2013-04-01	0
2013-07-01	0
2013-10-01	0
2014-01-01	0
2014-04-01	0
2014-07-01	1000
2014-10-01	1000
2015-01-01	1000
2015-04-01	1000
2015-07-01	0
2015-10-01	0
2016-01-01	0
2016-04-01	0
2016-07-01	0
2016-10-01	0
2017-01-01	800
2017-04-01	800
2017-07-01	800
2017-10-01	800
2018-01-01	0
2018-04-01	0