Year	US Dollar per National Currency Units
1960-01-01	2.461799999
1961-01-01	2.461799999
1962-01-01	2.461799999
1963-01-01	2.461799999
1964-01-01	2.461799999
1965-01-01	2.461799999
1966-01-01	2.461799999
1967-01-01	2.461799999
1968-01-01	2.461799999
1969-01-01	2.461799999
1970-01-01	2.461799999
1971-01-01	2.461799999
1972-01-01	2.240099999
1973-01-01	2.020199999
1974-01-01	1.839699999
1975-01-01	1.966300000
1976-01-01	1.880299999
1977-01-01	1.729999999
1978-01-01	1.577099999
1979-01-01	1.496199999
1980-01-01	1.530299999
1981-01-01	1.745499999
1982-01-01	1.922699999
1983-01-01	1.980899999
1984-01-01	2.795700000
1985-01-01	3.201500000
1986-01-01	3.722100000
1987-01-01	3.722100000
1988-01-01	3.722100000
1989-01-01	4.722100000
1990-01-01	5.222100000
1991-01-01	5.434200000
1992-01-01	5.751800000
1993-01-01	5.800000000
1994-01-01	8.446200000
1995-01-01	8.317400000
1996-01-01	8.298200000
1997-01-01	8.279800000
1998-01-01	8.278700000
1999-01-01	8.279500000
2000-01-01	8.277400000
2001-01-01	8.276800000
2002-01-01	8.277300000
2003-01-01	8.276700000
2004-01-01	8.276500000
2005-01-01	8.070200000
2006-01-01	7.808700000
2007-01-01	7.304600000
2008-01-01	6.834600000
2009-01-01	6.828200000
2010-01-01	6.622900000
2011-01-01	6.300900000
2012-01-01	6.289600000
2013-01-01	6.102400000
2014-01-01	6.119000000
2015-01-01	6.491500000
2016-01-01	6.949800000
2017-01-01	6.511600000