Year	National currency (Billions)
1980	0.156
1981	0.187
1982	0.213
1983	0.210
1984	0.245
1985	0.273
1986	0.321
1987	0.367
1988	0.435
1989	0.485
1990	0.548
1991	0.544
1992	0.602
1993	0.656
1994	0.733
1995	0.790
1996	0.843
1997	0.948
1998	0.988
1999	1.049
2000	1.137
2001	1.237
2002	1.298
2003	1.267
2004	1.369
2005	1.477
2006	1.740
2007	1.861
2008	2.100
2009	2.091
2010	2.103
2011	2.257
2012	2.229
2013	2.362
2014	2.574
2015	2.584
2016	2.720
2017	2.858
2018	2.906
2019	2.989
2020	2.387
2021	2.318
2022	2.628
2023	2.884
2024	3.062
2025	3.260
2026	3.453
2027	3.631
2028	3.811
2029	4.000