Year	US Dollar per National Currency Units
1960-01-01	0.144801621799131
1961-01-01	0.145222189971714
1962-01-01	0.144885540444058
1963-01-01	0.144696860099073
1964-01-01	0.144487790802556
1965-01-01	0.145116819060386
1966-01-01	0.144592249876315
1967-01-01	0.134012329152240
1968-01-01	0.133315557943383
1969-01-01	0.133475707439065
1970-01-01	0.133529176142813
1971-01-01	0.141602945361314
1972-01-01	0.146049364706594
1973-01-01	0.158982511948964
1974-01-01	0.176991150473804
1975-01-01	0.161877782300587
1976-01-01	0.172786177135687
1977-01-01	0.173085244512866
1978-01-01	0.196463654262567
1979-01-01	0.186393289876308
1980-01-01	0.166251039096634
1981-01-01	0.136518771349695
1982-01-01	0.119274809174532
1983-01-01	0.101265822784810
1984-01-01	0.088809946714032
1985-01-01	0.111495149960977
1986-01-01	0.136193394620361
1987-01-01	0.164028540966128
1988-01-01	0.145475705557172
1989-01-01	0.151343170639425
1990-01-01	0.173130193905817
1991-01-01	0.169104591189651
1992-01-01	0.159859323795060
1993-01-01	0.147655961609450
1994-01-01	0.164392569455861
1995-01-01	0.180310133429499
1996-01-01	0.168222726890403
1997-01-01	0.146498681511866
1998-01-01	0.156580286541924
1999-01-01	0.135157052494999
2000-01-01	0.124680506202855
2001-01-01	0.118913133955645
2002-01-01	0.141199062438225
2003-01-01	0.167852826641601
2004-01-01	0.182895603189699
2005-01-01	0.158125266836388
2006-01-01	0.176634754654326
2007-01-01	0.197032687722893
2008-01-01	0.189218339041420
2009-01-01	0.192674514941909
2010-01-01	0.178148326296474
2011-01-01	0.174046226677806
2012-01-01	0.176706543443304
2013-01-01	0.184750678958745
2014-01-01	0.163361322573268
2015-01-01	0.146412884333821
2016-01-01	0.141787658802178
2017-01-01	0.161090258872046