Year	US Dollar per National Currency Units
1975-01-01	1.21176035758632
1976-01-01	1.15450395011860
1977-01-01	1.16934782467809
1978-01-01	1.25830845347635
1979-01-01	1.29365032919489
1980-01-01	1.29858843717478
1981-01-01	1.17630741805740
1982-01-01	1.10219693578912
1983-01-01	1.06635446190481
1984-01-01	1.02274214485650
1985-01-01	1.02528941988160
1986-01-01	1.17883739153546
1987-01-01	1.30348449254464
1988-01-01	1.34228019539421
1989-01-01	1.28369359535191
1990-01-01	1.35882700042941
1991-01-01	1.36786792153038
1992-01-01	1.40891621457936
1993-01-01	1.39818740511284
1994-01-01	1.43659360581959
1995-01-01	1.52290404095273
1996-01-01	1.45071129897425
1997-01-01	1.37450603005882
1998-01-01	1.35705275317405
1999-01-01	1.36557062780220
2000-01-01	1.31631589322975
2001-01-01	1.27111728606632
2002-01-01	1.29995325045210
2003-01-01	1.40648153988008
2004-01-01	1.48365960279305
2005-01-01	1.47302991695118
2006-01-01	1.47556557584775
2007-01-01	1.53503986269056
2008-01-01	1.58274076819162
2009-01-01	1.54483575153234
2010-01-01	1.52421500000000
2011-01-01	1.58211500000000
2012-01-01	1.53494833333333
2013-01-01	1.52084961842723
2014-01-01	1.51560312045695
2015-01-01	1.39641666666667
2016-01-01	1.38709583333333
2017-01-01	1.39124754101755