Year	US Dollar per National Currency Units
1960-01-01	2.2081719432
1961-01-01	2.2115584684
1962-01-01	2.2071481100
1963-01-01	2.2025014824
1964-01-01	2.1973823164
1965-01-01	2.2073843792
1966-01-01	2.1974610728
1967-01-01	1.8951152532
1968-01-01	1.8778676016
1969-01-01	1.8907048948
1970-01-01	1.8851919468
1971-01-01	2.0102571100
1972-01-01	1.8492790284
1973-01-01	1.8296686848
1974-01-01	1.8495940540
1975-01-01	1.5936357540
1976-01-01	1.3407489536
1977-01-01	1.5010969840
1978-01-01	1.6022989580
1979-01-01	1.6893247800
1980-01-01	1.4944026900
1981-01-01	1.2443511200
1982-01-01	1.0998331260
1983-01-01	0.8938851400
1984-01-01	0.7808697060
1985-01-01	0.9793358340
1986-01-01	1.1021958180
1987-01-01	1.3195634820
1988-01-01	1.1872527300
1989-01-01	1.2256858532
1990-01-01	1.3983198820
1991-01-01	1.3780794872
1992-01-01	1.2832567816
1993-01-01	1.1110952912
1994-01-01	1.2184402644
1995-01-01	1.2644340020
1996-01-01	1.3239738404
1997-01-01	1.1265315456
1998-01-01	1.1713439372
1999-01-01	1.0046000000
2000-01-01	0.9305000000
2001-01-01	0.8813000000
2002-01-01	1.0487000000
2003-01-01	1.2630000000
2004-01-01	1.3621000000
2005-01-01	1.1797000000
2006-01-01	1.3170000000
2007-01-01	1.4721000000
2008-01-01	1.3917000000
2009-01-01	1.4406000000
2010-01-01	1.3362000000
2011-01-01	1.2939000000
2012-01-01	1.3194000000
2013-01-01	1.3791000000
2014-01-01	1.2141000000
2015-01-01	1.0887000000
2016-01-01	1.0541000000
2017-01-01	1.1993000000