Year	National currency (Units)
1980	3707.335
1981	4174.364
1982	3886.067
1983	4127.722
1984	5191.440
1985	5781.326
1986	6805.297
1987	7406.701
1988	8360.840
1989	9351.487
1990	10988.415
1991	11473.915
1992	12419.455
1993	12433.128
1994	12789.100
1995	13509.297
1996	13823.350
1997	13990.162
1998	15089.642
1999	15718.041
2000	15777.054
2001	14993.602
2002	15007.454
2003	16340.049
2004	17525.244
2005	18527.357
2006	20558.467
2007	21449.223
2008	22848.199
2009	22271.123
2010	23100.984
2011	24606.125
2012	24927.000
2013	25764.018
2014	27022.964
2015	27786.943
2016	28598.080
2017	30463.426
2018	31280.917
2019	31788.254
2020	22939.466
2021	27796.504
2022	34300.695
2023	36573.945
2024	38073.725
2025	39583.575
2026	41032.073
2027	42421.487
2028	43857.950
2029	45343.053
