Year	National currency (Billions)
1980	5.125
1981	7.077
1982	5.707
1983	2.122
1984	3.208
1985	3.215
1986	0.464
1987	0.278
1988	-0.228
1989	-0.375
1990	-0.145
1991	-0.096
1992	-0.745
1993	-1.153
1994	-2.067
1995	-2.007
1996	-0.884
1997	-1.233
1998	-2.150
1999	-1.788
2000	0.786
2001	0.287
2002	-0.535
2003	1.020
2004	1.263
2005	2.814
2006	3.995
2007	0.638
2008	8.168
2009	0.624
2010	1.423
2011	5.973
2012	3.757
2013	2.949
2014	0.775
2015	-2.582
2016	-3.414
2017	-1.741
2018	-0.656
2019	-0.678
2020	-2.613
2021	-1.537
2022	0.582
2023	-2.667
2024	-2.793
2025	-2.811
2026	-2.792
2027	-2.775
2028	-2.796
2029	-2.808