Year	National currency (Billions)
1985	-0.137
1986	-0.054
1987	-0.308
1988	-0.308
1989	-0.168
1990	-0.207
1991	-0.302
1992	0.069
1993	-0.084
1994	-0.102
1995	-0.082
1996	-0.162
1997	-0.156
1998	-0.312
1999	-0.161
2000	-0.247
2001	-0.182
2002	-0.314
2003	-0.189
2004	-0.091
2005	-0.499
2006	-0.428
2007	-0.640
2008	-0.771
2009	-1.540
2010	-1.505
2011	-2.058
2012	-3.218
2013	-2.463
2014	-2.217
2015	-2.298
2016	-1.036
2017	-1.054
2018	-1.420
2019	-1.813
2020	-2.665
2021	-2.484
2022	-2.404
2023	-2.647
2024	-2.912
2025	-2.128
2026	-2.028
2027	-1.488
2028	-1.179
2029	-0.644