Year	National currency per current international dollar (Units)
1980	2.709
1981	2.928
1982	2.811
1983	2.837
1984	3.010
1985	3.004
1986	3.712
1987	4.572
1988	5.708
1989	6.565
1990	7.366
1991	7.472
1992	7.695
1993	7.791
1994	8.842
1995	9.268
1996	10.695
1997	11.471
1998	11.393
1999	12.017
2000	13.282
2001	13.363
2002	13.753
2003	13.226
2004	14.210
2005	15.425
2006	16.324
2007	17.605
2008	20.028
2009	19.351
2010	20.471