Year	National currency (Billions)
1980	29238.733
1981	29399.448
1982	18583.736
1983	22804.066
1984	32947.144
1985	40953.270
1986	38179.401
1987	44566.444
1988	31994.744
1989	18494.450
1990	16012.252
1991	22128.932
1992	23123.595
1993	24742.182
1994	26728.923
1995	28464.374
1996	29613.825
1997	32631.446
1998	33904.073
1999	33632.840
2000	34002.801
2001	35328.911
2002	36530.093
2003	37151.105
2004	39937.438
2005	40217.000
2006	40840.000
2007	44643.000
2008	48691.000
2009	53674.000
2010	57954.000
2011	58457.000
2012	59956.000
2013	62251.000
2014	63798.000
2015	64092.000
2016	65089.000
2017	65677.000
2018	64439.000
2019	59983.000
2020	44443.000
2021	39998.700
2022	39998.700