Year	National currency per current international dollar
1980	1.567
1981	1.473
1982	1.445
1983	1.415
1984	1.45
1985	1.529
1986	1.561
1987	1.601
1988	1.652
1989	1.733
1990	1.667
1991	1.719
1992	1.748
1993	1.739
1994	1.755
1995	1.77
1996	1.785
1997	1.788
1998	1.798
1999	1.791
2000	1.799
2001	1.798
2002	1.777
2003	1.743
2004	1.732
2005	1.721
2006	1.748
2007	1.742
2008	1.843
2009	1.829
2010	1.816
2011	1.783
2012	1.818
2013	1.839
2014	1.819
2015	1.849
2016	1.878
2017	1.862
2018	1.844
2019	1.849
2020	1.849
2021	1.85
2022	1.85
2023	1.851
2024	1.851