Year	National currency (Billions)
1980	0.040
1981	-0.027
1982	0.009
1983	0.004
1984	0.022
1986	-0.014
1987	0.056
1988	0.096
1989	0.181
1990	0.195
1991	0.137
1992	-0.090
1993	-0.135
1994	-0.177
1995	0.092
1996	-0.036
1997	0.227
1998	0.154
1999	-0.057
2000	-0.080
2001	-0.196
2002	-0.387
2003	-0.173
2004	-0.544
2005	-0.133
2006	2.076
2007	0.751
2008	0.682
2009	-0.692
2010	-2.799
2011	-1.101
2012	1.707
2013	0.597
2014	-0.980
2015	-2.833
2016	-4.610
2017	-3.380
2018	-5.146
2019	-3.012
2020	-1.586
2021	-1.960
2022	-1.316
2023	0.512
2024	0.599
2025	-1.095
2026	-0.924
2027	-0.789
2028	-0.674
2029	-0.617