Year	National currency (Units)
1980	20646.512
1981	18149.973
1982	18308.052
1983	17191.252
1984	15756.482
1985	16774.049
1986	15380.493
1987	14519.823
1988	14400.918
1989	14427.318
1990	13723.935
1991	13501.330
1992	13205.154
1993	13195.060
1994	13234.587
1995	13249.626
1996	13200.528
1997	13088.627
1998	13173.333
1999	13261.478
2000	13086.423
2001	13177.917
2002	13242.326
2003	13824.913
2004	14032.395
2005	14661.104
2006	15575.372
2007	15630.939
2008	16544.964
2009	16691.547
2010	16546.270
2011	16499.959
2012	16614.275
2013	17091.292
2014	17554.333
2015	17369.908
2016	17903.735
2017	18274.620
2018	18618.374
2019	18636.724
2020	18687.245
2021	18615.217
2022	18299.132
2023	17851.040
2024	17981.194
2025	18331.679
2026	17822.640
2027	18037.988
2028	18257.883
2029	18500.152