Quarter	Millions of US Dollars
2004-10-01	0
2005-01-01	0
2005-04-01	0
2005-07-01	0
2005-10-01	0
2006-01-01	0
2006-04-01	0
2006-07-01	0
2006-10-01	14
2007-01-01	14
2007-04-01	15
2007-07-01	17
2007-10-01	17
2008-01-01	15
2008-04-01	16
2008-07-01	16
2008-10-01	0
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	64
2010-07-01	118
2010-10-01	124
2011-01-01	124
2011-04-01	118
2011-07-01	103
2011-10-01	102
2012-01-01	164
2012-04-01	147
2012-07-01	138
2012-10-01	639
2013-01-01	1065
2013-04-01	1497
2013-07-01	1767
2013-10-01	1834
2014-01-01	1910
2014-04-01	2219
2014-07-01	2561
2014-10-01	2988
2015-01-01	2796
2015-04-01	2837
2015-07-01	2520
2015-10-01	2787
2016-01-01	3011
2016-04-01	2772
2016-07-01	2687
2016-10-01	2277
2017-01-01	2399
2017-04-01	2022
2017-07-01	2032
2017-10-01	1899
2018-01-01	1984