Year	National currency (Billions)
1980	0.040
1981	0.049
1982	0.050
1983	0.053
1984	0.080
1985	0.093
1986	0.107
1987	0.194
1988	0.195
1989	0.220
1990	0.205
1991	0.306
1992	0.347
1993	0.400
1994	0.503
1995	0.496
1996	0.553
1997	0.474
1998	0.382
1999	0.474
2000	0.436
2001	0.504
2002	0.415
2003	0.572
2004	0.689
2005	0.967
2006	1.195
2007	1.808
2008	1.884
2009	2.380
2010	2.845
2011	3.102
2012	3.268
2013	3.410
2014	3.489
2015	3.809
2016	4.245
2017	4.331
2018	4.184
2019	4.462
2020	4.218
2021	4.004
2022	4.367
2023	4.359
2024	4.282
2025	4.575
2026	4.851
2027	5.176
2028	5.505
2029	5.871