Quarter	Millions of US Dollars
1975-10-01	0
1976-01-01	0
1976-04-01	0
1976-07-01	0
1976-10-01	0
1977-01-01	0
1977-04-01	0
1977-07-01	0
1977-10-01	0
1978-01-01	0
1978-04-01	0
1978-07-01	0
1978-10-01	0
1979-01-01	0
1979-04-01	0
1979-07-01	0
1979-10-01	0
1980-01-01	0
1980-04-01	0
1980-07-01	0
1980-10-01	0
1981-01-01	0
1981-04-01	0
1981-07-01	0
1981-10-01	0
1982-01-01	0
1982-04-01	0
1982-07-01	0
1982-10-01	0
1983-01-01	0
1983-04-01	0
1983-07-01	0
1983-10-01	0
1984-01-01	0
1984-04-01	0
1984-07-01	0
1984-10-01	0
1985-01-01	0
1985-04-01	0
1985-07-01	0
1985-10-01	25
1986-01-01	25
1986-04-01	25
1986-07-01	25
1986-10-01	18
1987-01-01	18
1987-04-01	18
1987-07-01	18
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	20
1993-04-01	54
1993-07-01	56
1993-10-01	54
1994-01-01	85
1994-04-01	550
1994-07-01	550
1994-10-01	550
1995-01-01	30
1995-04-01	82
1995-07-01	82
1995-10-01	82
1996-01-01	90
1996-04-01	155
1996-07-01	185
1996-10-01	367
1997-01-01	724
1997-04-01	542
1997-07-01	526
1997-10-01	561
1998-01-01	427
1998-04-01	574
1998-07-01	521
1998-10-01	835
1999-01-01	596
1999-04-01	700
1999-07-01	250
1999-10-01	229
2000-01-01	569
2000-04-01	454
2000-07-01	454
2000-10-01	225
2001-01-01	226
2001-04-01	93
2001-07-01	93
2001-10-01	92
2002-01-01	15
2002-04-01	150
2002-07-01	150
2002-10-01	150
2003-01-01	250
2003-04-01	100
2003-07-01	100
2003-10-01	100
2004-01-01	0
2004-04-01	17
2004-07-01	61
2004-10-01	68
2005-01-01	69
2005-04-01	138
2005-07-01	89
2005-10-01	130
2006-01-01	132
2006-04-01	42
2006-07-01	42
2006-10-01	22
2007-01-01	21
2007-04-01	322
2007-07-01	376
2007-10-01	504
2008-01-01	501
2008-04-01	199
2008-07-01	151
2008-10-01	0
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	50
2010-01-01	665
2010-04-01	665
2010-07-01	665
2010-10-01	615
2011-01-01	0
2011-04-01	0
2011-07-01	0
2011-10-01	150
2012-01-01	150
2012-04-01	500
2012-07-01	500
2012-10-01	350
2013-01-01	350
2013-04-01	400
2013-07-01	775
2013-10-01	1575
2014-01-01	1700
2014-04-01	1680
2014-07-01	1305
2014-10-01	505
2015-01-01	430
2015-04-01	50
2015-07-01	50
2015-10-01	50
2016-01-01	500
2016-04-01	500
2016-07-01	1000
2016-10-01	1000
2017-01-01	547
2017-04-01	547
2017-07-01	48
2017-10-01	49
2018-01-01	0
2018-04-01	0