Year	National currency per current international dollar
1980	0.376
1981	0.372
1982	0.368
1983	0.378
1984	0.379
1985	0.437
1986	0.606
1987	0.638
1988	0.688
1989	0.735
1990	0.995
1991	1.281
1992	1.364
1993	1.527
1994	1.67
1995	1.778
1996	1.901
1997	2.024
1998	2.192
1999	2.269
2000	2.372
2001	2.497
2002	2.617
2003	2.684
2004	2.772
2005	2.84
2006	2.894
2007	3.019
2008	3.241
2009	3.331
2010	3.462
2011	3.626
2012	3.676
2013	3.734
2014	3.775
2015	3.856
2016	3.956
2017	4.022
2018	4.078
2019	4.184
2020	4.274
2021	4.365
2022	4.46
2023	4.57
2024	4.686