Year	National currency per current international dollar
1980	2.988
1981	2.994
1982	3.024
1983	3.123
1984	3.274
1985	3.441
1986	3.721
1987	3.773
1988	3.839
1989	3.84
1990	3.905
1991	3.981
1992	4.07
1993	4.097
1994	4.038
1995	4.253
1996	4.194
1997	4.153
1998	4.123
1999	4.087
2000	3.968
2001	3.908
2002	3.894
2003	3.863
2004	3.808
2005	3.737
2006	3.683
2007	3.716
2008	3.81
2009	3.787
2010	3.78
2011	3.677
2012	3.621
2013	3.605
2014	3.552
2015	3.588
2016	3.601
2017	3.562
2018	3.53
2019	3.516
2020	3.505
2021	3.494
2022	3.484
2023	3.471
2024	3.458