Year	National currency (Units)
1980	31226.208
1981	26609.679
1982	30987.180
1983	33823.420
1984	30018.373
1985	29891.276
1986	29395.550
1987	29031.322
1988	28365.431
1989	28431.228
1990	28869.878
1991	28335.467
1992	27702.111
1993	27173.020
1994	25370.640
1995	25420.481
1996	25397.245
1997	24639.942
1998	25444.734
1999	26245.992
2000	26843.338
2001	27503.272
2002	25772.927
2003	26677.148
2004	27667.451
2005	26190.502
2006	25264.287
2007	25264.728
2008	26059.638
2009	26982.197
2010	27733.110
2011	24720.738
2012	25239.908
2013	25188.837
2014	24094.092
2015	24328.801
2016	24071.342
2017	24494.183
2018	25503.608
2019	26298.235
2020	25681.950
2021	26243.740
2022	26727.378
2023	27389.046
2024	28244.629
2025	29007.543
2026	29574.560
2027	30153.144
2028	30742.359
2029	31343.116