Year	National currency (Billions)
1980	0.446
1981	0.464
1982	0.464
1983	0.489
1984	0.546
1985	0.541
1986	0.590
1987	0.690
1988	0.815
1989	0.940
1990	1.066
1991	1.157
1992	1.343
1993	1.453
1994	1.501
1995	1.593
1996	1.656
1997	1.691
1998	1.783
1999	1.900
2000	2.165
2001	2.259
2002	2.397
2003	2.535
2004	2.713
2005	2.853
2006	3.168
2007	3.398
2008	3.464
2009	3.363
2010	3.478
2011	3.638
2012	3.799
2013	4.044
2014	4.250
2015	4.389
2016	4.481
2017	4.533
2018	4.586
2019	4.774
2020	4.095
2021	4.849
2022	5.661
2023	6.187
2024	6.592
2025	6.913
2026	7.177
2027	7.453
2028	7.738
2029	8.035