Quarter	Millions of US Dollars
2001-10-01	10
2002-01-01	10
2003-01-01	9
2003-04-01	9
2003-07-01	9
2003-10-01	8
2006-01-01	16
2006-04-01	17
2006-07-01	17
2006-10-01	18
2009-10-01	0
2010-01-01	0
2010-04-01	0
2010-07-01	0
2010-10-01	0
2011-01-01	0
2011-04-01	0
2011-07-01	0
2011-10-01	0
2012-01-01	0
2012-04-01	0
2012-07-01	0
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	0
2014-10-01	0
2015-01-01	0
2015-04-01	0
2015-07-01	0
2015-10-01	327
2016-01-01	342
2016-04-01	333
2016-07-01	335
2016-10-01	0
2017-01-01	0
2017-04-01	0
2017-07-01	0
2017-10-01	0
2018-01-01	0
2018-04-01	309