Quarter	Millions of US Dollars
1992-07-01	0
1992-10-01	0
1993-01-01	0
1993-04-01	0
1993-07-01	0
1993-10-01	0
1994-01-01	0
1994-04-01	0
1994-07-01	0
1994-10-01	0
1995-01-01	0
1995-04-01	0
1995-07-01	0
1995-10-01	0
1996-01-01	0
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	0
1998-04-01	0
1998-07-01	0
1998-10-01	0
1999-01-01	150
1999-04-01	150
1999-07-01	150
1999-10-01	150
2000-01-01	0
2000-04-01	0
2000-07-01	0
2000-10-01	0
2001-01-01	0
2001-04-01	0
2001-07-01	200
2001-10-01	200
2002-01-01	200
2002-04-01	800
2002-07-01	600
2002-10-01	600
2003-01-01	200
2003-04-01	200
2003-07-01	200
2003-10-01	400
2004-01-01	400
2004-04-01	510
2004-07-01	510
2004-10-01	310
2005-01-01	110
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	0
2007-01-01	400
2007-04-01	400
2007-07-01	400
2007-10-01	400
2008-01-01	0
2008-04-01	0
2008-07-01	0
2008-10-01	0
2009-01-01	268
2009-04-01	268
2009-07-01	268
2009-10-01	268
2010-01-01	0
2010-04-01	544
2010-07-01	544
2010-10-01	544
2011-01-01	1544
2011-04-01	4800
2011-07-01	4800
2011-10-01	5150
2012-01-01	2375
2012-04-01	1485
2012-07-01	1485
2012-10-01	1835
2013-01-01	960
2013-04-01	1800
2013-07-01	2486
2013-10-01	1827
2014-01-01	3102
2014-04-01	2257
2014-07-01	1648
2014-10-01	1626
2015-01-01	651
2015-04-01	3006
2015-07-01	3536
2015-10-01	3536
2016-01-01	8272
2016-04-01	5617
2016-07-01	5036
2016-10-01	5036
2017-01-01	975
2017-04-01	975
2017-07-01	975
2017-10-01	975
2018-01-01	1125
2018-04-01	1380