Year	National currency per current international dollar
1980	4.15
1981	4.196
1982	4.338
1983	4.365
1984	4.618
1985	4.718
1986	4.797
1987	5.085
1988	5.344
1989	5.788
1990	6.001
1991	6.336
1992	6.808
1993	7.223
1994	7.519
1995	7.669
1996	7.975
1997	8.291
1998	8.299
1999	7.846
2000	7.414
2001	7.126
2002	6.776
2003	6.253
2004	5.87
2005	5.684
2006	5.488
2007	5.512
2008	5.476
2009	5.414
2010	5.367
2011	5.462
2012	5.549
2013	5.552
2014	5.604
2015	5.747
2016	5.778
2017	5.837
2018	5.922
2019	5.951
2020	5.961
2021	5.955
2022	5.951
2023	5.95
2024	5.95