Year	National currency per current international dollar
1980	0.836
1981	0.865
1982	0.907
1983	0.95
1984	0.988
1985	1.106
1986	1.233
1987	1.401
1988	1.495
1989	1.506
1990	1.496
1991	1.452
1992	1.445
1993	1.443
1994	1.424
1995	1.422
1996	1.427
1997	1.408
1998	1.408
1999	1.395
2000	1.396
2001	1.426
2002	1.414
2003	1.406
2004	1.417
2005	1.407
2006	1.398
2007	1.42
2008	1.448
2009	1.449
2010	1.474
2011	1.486
2012	1.454
2013	1.475
2014	1.481
2015	1.468
2016	1.477
2017	1.5
2018	1.484
2019	1.49
2020	1.493
2021	1.497
2022	1.499
2023	1.5
2024	1.499