Quarter	Millions of US Dollars
1973-10-01	0
1974-01-01	0
1974-04-01	0
1974-07-01	0
1974-10-01	0
1975-01-01	0
1975-04-01	0
1975-07-01	0
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	25
1979-01-01	25
1979-04-01	25
1979-07-01	25
1987-01-01	0
1987-04-01	0
1987-07-01	0
1987-10-01	0
1988-01-01	0
1988-04-01	0
1988-07-01	0
1988-10-01	0
1989-01-01	0
1989-04-01	0
1989-07-01	0
1989-10-01	0
1990-01-01	0
1990-04-01	0
1990-07-01	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	152
1993-10-01	164
1994-01-01	223
1994-04-01	188
1994-07-01	240
1994-10-01	234
1995-01-01	229
1995-04-01	245
1995-07-01	245
1995-10-01	245
1996-01-01	245
1996-04-01	245
1996-07-01	5
1996-10-01	250
1997-01-01	250
1997-04-01	216
1997-07-01	216
1997-10-01	138
1998-01-01	194
1998-04-01	245
1998-07-01	250
1998-10-01	72
1999-01-01	59
1999-04-01	269
1999-07-01	245
1999-10-01	148
2000-01-01	170
2000-04-01	141
2000-07-01	135
2000-10-01	130
2001-01-01	390
2001-04-01	324
2001-07-01	225
2001-10-01	225
2004-04-01	0
2004-07-01	0
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	0
2007-01-01	0
2007-04-01	0
2007-07-01	0
2007-10-01	0
2008-01-01	0
2008-04-01	250
2008-07-01	250
2008-10-01	250
2009-01-01	250
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	0
2010-07-01	0
2010-10-01	25
2011-01-01	25
2011-04-01	40
2011-07-01	40
2011-10-01	15
2012-01-01	41
2012-04-01	26
2012-07-01	26
2012-10-01	26
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	26
2015-01-01	26
2015-04-01	26
2015-07-01	26
2015-10-01	0
2016-01-01	0
2016-04-01	0
2016-07-01	0
2016-10-01	0
2017-01-01	500
2017-04-01	500
2017-07-01	500
2017-10-01	500
2018-01-01	0
2018-04-01	0