Year	US Dollar per National Currency Units
1967-01-01	235
1968-01-01	326
1969-01-01	326
1970-01-01	378
1971-01-01	415
1972-01-01	415
1973-01-01	415
1974-01-01	415
1975-01-01	415
1976-01-01	415
1977-01-01	415
1978-01-01	625
1979-01-01	627
1980-01-01	626.75
1981-01-01	644
1982-01-01	692.50
1983-01-01	994
1984-01-01	1074.00
1985-01-01	1125.00
1986-01-01	1641.00
1987-01-01	1650.00
1988-01-01	1731.00
1989-01-01	1797.00
1990-01-01	1901.00
1991-01-01	1992.00
1992-01-01	2062.00
1993-01-01	2110.00
1994-01-01	2200.00
1995-01-01	2308.00
1996-01-01	2383.00
1997-01-01	4650.00
1998-01-01	8025.00
1999-01-01	7085.00
2000-01-01	9595.00
2001-01-01	10400.00
2002-01-01	8940.00
2003-01-01	8465.00
2004-01-01	9290.00
2005-01-01	9830.00
2006-01-01	9020.00
2007-01-01	9419.00
2008-01-01	10950.00
2009-01-01	9400.00
2010-01-01	8991.00
2011-01-01	9068.00
2012-01-01	9670.00
2013-01-01	12189.00
2014-01-01	12440.00
2015-01-01	13795.00
2016-01-01	13436.00
2017-01-01	13548.00