Year	US Dollar per National Currency Units
1960-01-01	2.766167250
1961-01-01	2.773155462
1962-01-01	2.773987392
1963-01-01	2.774985708
1964-01-01	2.775484866
1965-01-01	2.773488234
1966-01-01	2.773155462
1967-01-01	2.387139942
1968-01-01	2.383146678
1969-01-01	2.374827378
1970-01-01	2.386474398
1971-01-01	2.520248742
1972-01-01	2.617418166
1973-01-01	2.921571774
1974-01-01	2.965164906
1975-01-01	2.783637780
1976-01-01	2.436556584
1977-01-01	2.056364574
1978-01-01	2.373163518
1979-01-01	2.515257162
1980-01-01	2.099458548
1981-01-01	1.707453132
1982-01-01	1.324765332
1983-01-01	1.061875452
1984-01-01	0.959548062
1985-01-01	1.079345982
1986-01-01	1.256713458
1987-01-01	1.526425164
1988-01-01	1.466526204
1989-01-01	1.516442004
1990-01-01	1.716937134
1991-01-01	1.720930398
1992-01-01	1.451551464
1993-01-01	1.170026352
1994-01-01	1.263036126
1995-01-01	1.370521482
1996-01-01	1.267528548
1997-01-01	1.096816512
1998-01-01	1.166698632
1999-01-01	1.004600000
2000-01-01	0.930500000
2001-01-01	0.881300000
2002-01-01	1.048700000
2003-01-01	1.263000000
2004-01-01	1.362100000
2005-01-01	1.179700000
2006-01-01	1.317000000
2007-01-01	1.472100000
2008-01-01	1.391700000
2009-01-01	1.440600000
2010-01-01	1.336200000
2011-01-01	1.293900000
2012-01-01	1.319400000
2013-01-01	1.379100000
2014-01-01	1.214100000
2015-01-01	1.088700000
2016-01-01	1.054100000
2017-01-01	1.199300000