Quarter	Millions of US Dollars
1996-04-01	0
1996-07-01	0
1996-10-01	0
1997-01-01	0
1997-04-01	0
1997-07-01	0
1997-10-01	0
1998-01-01	6
1998-04-01	6
1998-07-01	6
1998-10-01	6
1999-01-01	0
1999-04-01	64
1999-07-01	61
1999-10-01	60
2000-01-01	60
2000-04-01	30
2000-07-01	30
2000-10-01	41
2001-01-01	41
2001-04-01	44
2001-07-01	44
2001-10-01	32
2002-01-01	32
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	3
2015-10-01	199
2016-01-01	208
2016-04-01	202
2016-07-01	201
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	6