Year	US Dollar per National Currency Units
1960-01-01	3.11933097
1961-01-01	3.11933097
1962-01-01	3.11933097
1963-01-01	3.11158589
1964-01-01	3.09996827
1965-01-01	3.09996827
1966-01-01	3.09996827
1967-01-01	3.10384081
1968-01-01	3.10577708
1969-01-01	3.09609573
1970-01-01	3.10771335
1971-01-01	3.26067868
1972-01-01	3.32457559
1973-01-01	3.18516415
1974-01-01	2.98185580
1975-01-01	2.83276301
1976-01-01	2.21315661
1977-01-01	2.22090169
1978-01-01	2.33320535
1979-01-01	2.40871988
1980-01-01	2.08149025
1981-01-01	1.61291291
1982-01-01	1.41347710
1983-01-01	1.16757081
1984-01-01	1.00105159
1985-01-01	1.15401692
1986-01-01	1.42509472
1987-01-01	1.65551085
1988-01-01	1.48318282
1989-01-01	1.52384449
1990-01-01	1.71359895
1991-01-01	1.68261863
1992-01-01	1.31666360
1993-01-01	1.13659049
1994-01-01	1.18886978
1995-01-01	1.22178637
1996-01-01	1.26438431
1997-01-01	1.09980136
1998-01-01	1.17144335
1999-01-01	1.00460000
2000-01-01	0.93050000
2001-01-01	0.88130000
2002-01-01	1.04870000
2003-01-01	1.26300000
2004-01-01	1.36210000
2005-01-01	1.17970000
2006-01-01	1.31700000
2007-01-01	1.47210000
2008-01-01	1.39170000
2009-01-01	1.44060000
2010-01-01	1.33620000
2011-01-01	1.29390000
2012-01-01	1.31940000
2013-01-01	1.37910000
2014-01-01	1.21410000
2015-01-01	1.08870000
2016-01-01	1.05410000
2017-01-01	1.19930000