Quarter	Millions of US Dollars
1990-10-01	0
1991-01-01	0
1991-04-01	0
1991-07-01	0
1991-10-01	0
1992-01-01	0
1992-04-01	0
1992-07-01	0
1992-10-01	0
1993-01-01	0
1993-04-01	0
1993-07-01	62
1993-10-01	64
1994-01-01	64
1994-04-01	62
1994-07-01	0
1994-10-01	129
1995-01-01	145
1995-04-01	144
1995-07-01	140
2001-07-01	0
2001-10-01	0
2002-01-01	31
2002-04-01	31
2002-07-01	26
2002-10-01	19
2003-01-01	84
2003-04-01	100
2003-07-01	100
2003-10-01	53
2004-01-01	53
2004-04-01	19
2004-07-01	19
2004-10-01	13
2005-01-01	13
2005-04-01	186
2005-07-01	163
2005-10-01	140
2006-01-01	140
2006-04-01	15
2006-07-01	15
2006-10-01	0
2007-01-01	0
2007-04-01	0
2007-07-01	0
2007-10-01	0
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	45
2009-01-01	45
2009-04-01	45
2009-07-01	45
2009-10-01	0
2010-01-01	0
2010-04-01	0
2010-07-01	587
2010-10-01	587
2011-01-01	587
2011-04-01	587
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	180
2014-01-01	180
2014-04-01	180
2014-07-01	180
2014-10-01	0
2015-01-01	0
2015-04-01	0
2015-07-01	0
2015-10-01	0
2016-01-01	80
2016-04-01	80
2016-07-01	80
2016-10-01	730
2017-01-01	650
2017-04-01	650
2017-07-01	650
2017-10-01	0
2018-01-01	0
2018-04-01	0