Quarter	Millions of US Dollars
1972-10-01	0
1973-01-01	0
1973-04-01	0
1973-07-01	0
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	10
1979-01-01	10
1979-04-01	10
1979-07-01	10
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	0
1986-01-01	0
1986-04-01	0
1986-07-01	0
1986-10-01	0
1987-01-01	14
1987-04-01	14
1987-07-01	14
1987-10-01	14
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	0
1999-04-01	0
1999-07-01	0
1999-10-01	0
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	374
2002-04-01	400
2002-07-01	197
2002-10-01	210
2003-01-01	0
2003-04-01	0
2003-07-01	204
2003-10-01	221
2004-01-01	214
2004-04-01	463
2004-07-01	250
2004-10-01	250
2005-01-01	250
2005-04-01	0
2005-07-01	0
2005-10-01	0
2006-01-01	0
2006-04-01	0
2006-07-01	225
2006-10-01	225
2007-01-01	225
2007-04-01	225
2007-07-01	0
2007-10-01	0
2008-01-01	316
2008-04-01	315
2008-07-01	286
2008-10-01	278
2009-01-01	0
2009-04-01	0
2009-07-01	0
2009-10-01	0
2010-01-01	0
2010-04-01	400
2010-07-01	400
2010-10-01	400
2011-01-01	400
2011-04-01	0
2011-07-01	270
2011-10-01	259
2012-01-01	267
2012-04-01	252
2012-07-01	0
2012-10-01	0
2013-01-01	0
2013-04-01	0
2013-07-01	0
2013-10-01	207
2014-01-01	207
2014-04-01	505
2014-07-01	489
2014-10-01	300
2015-01-01	300
2015-04-01	0
2015-07-01	0
2015-10-01	0
2016-01-01	0
2016-04-01	425
2016-07-01	425
2016-10-01	425
2017-01-01	425
2017-04-01	0
2017-07-01	0
2017-10-01	0
2018-01-01	0
2018-04-01	750