Year	National currency per current international dollar
1980	2.99
1981	3.051
1982	3.124
1983	3.433
1984	5.081
1985	5.794
1986	5.847
1987	6.134
1988	6.497
1989	6.816
1990	7.404
1991	8.345
1992	8.806
1993	9.19
1994	9.897
1995	10.426
1996	11.023
1997	11.51
1998	12.573
1999	13.21
2000	13.659
2001	14.107
2002	14.466
2003	14.657
2004	15.06
2005	15.456
2006	15.744
2007	15.806
2008	16.675
2009	17.008
2010	17.522
2011	17.854
2012	17.863
2013	17.914
2014	18.136
2015	17.839
2016	17.946
2017	18.02
2018	18.29
2019	18.658
2020	18.872
2021	19.053
2022	19.227
2023	19.402
2024	19.574