Year	National currency (Billions)
1980	0.039
1981	-0.030
1982	0.001
1983	-0.005
1984	0.012
1985	-0.015
1986	-0.035
1987	0.036
1988	0.073
1989	0.157
1990	0.174
1991	0.117
1992	-0.114
1993	-0.156
1994	-0.202
1995	0.061
1996	-0.076
1997	0.185
1998	0.103
1999	-0.133
2000	-0.143
2001	-0.298
2002	-0.555
2003	-0.347
2004	-0.712
2005	-0.334
2006	1.921
2007	0.578
2008	0.430
2009	-0.900
2010	-3.003
2011	-1.365
2012	1.357
2013	0.252
2014	-1.305
2015	-3.193
2016	-5.108
2017	-4.072
2018	-5.968
2019	-4.355
2020	-3.030
2021	-3.293
2022	-3.064
2023	-1.045
2024	-0.863
2025	-2.929
2026	-3.185
2027	-3.437
2028	-3.698
2029	-4.188