Year	National currency (Billions)
1980	0.296
1981	0.337
1982	0.381
1983	0.403
1984	0.580
1985	0.613
1986	0.667
1987	0.678
1988	0.654
1989	0.661
1990	0.692
1991	0.733
1992	0.705
1993	0.705
1994	0.719
1995	0.776
1996	0.776
1997	0.771
1998	0.789
1999	0.807
2000	0.838
2001	0.850
2002	0.888
2003	0.889
2004	0.872
2005	0.868
2006	0.849
2007	0.828
2008	0.867
2009	0.822
2010	0.829
2011	0.885
2012	0.893
2013	0.895
2014	0.914
2015	0.924
2016	0.985
2017	1.018
2018	1.020
2019	1.027
2020	1.032
2021	1.005
2022	0.985
2023	1.010
2024	1.036
2025	1.060
2026	1.076
2027	1.089
2028	1.102
2029	1.115