Year	US Dollar per National Currency Units
1960-01-01	1.4000
1961-01-01	1.3937
1962-01-01	1.3912
1963-01-01	1.3881
1964-01-01	1.3856
1965-01-01	1.3912
1966-01-01	1.3850
1967-01-01	1.1227
1968-01-01	1.1121
1969-01-01	1.1198
1970-01-01	1.1161
1971-01-01	1.1952
1972-01-01	1.1952
1973-01-01	1.4284
1974-01-01	1.3155
1975-01-01	1.0437
1976-01-01	0.9500
1977-01-01	1.0197
1978-01-01	1.0666
1979-01-01	0.9862
1980-01-01	0.9623
1981-01-01	0.8244
1982-01-01	0.7325
1983-01-01	0.6546
1984-01-01	0.4776
1985-01-01	0.4985
1986-01-01	0.5235
1987-01-01	0.6575
1988-01-01	0.6283
1989-01-01	0.5972
1990-01-01	0.5878
1991-01-01	0.5411
1992-01-01	0.5143
1993-01-01	0.5588
1994-01-01	0.6425
1995-01-01	0.6533
1996-01-01	0.7060
1997-01-01	0.5817
1998-01-01	0.5269
1999-01-01	0.5206
2000-01-01	0.4402
2001-01-01	0.4155
2002-01-01	0.5265
2003-01-01	0.6500
2004-01-01	0.7184
2005-01-01	0.6814
2006-01-01	0.7059
2007-01-01	0.7740
2008-01-01	0.5785
2009-01-01	0.7217
2010-01-01	0.7706
2011-01-01	0.7713
2012-01-01	0.8202
2013-01-01	0.8202
2014-01-01	0.7829
2015-01-01	0.6848
2016-01-01	0.6968
2017-01-01	0.7097