Year	National currency (Billions)
1990	0.047
1991	-0.020
1992	0.025
1993	0.004
1994	-0.028
1995	-0.022
1996	0.021
1997	0.032
1998	0.017
1999	-0.023
2000	0.001
2001	-0.128
2002	-0.128
2003	-0.076
2004	-0.001
2005	-0.036
2006	-0.118
2007	-0.089
2008	-0.096
2009	-0.357
2010	0.056
2011	-0.044
2012	0.039
2013	-0.054
2014	-0.006
2015	-0.003
2016	0.093
2017	-0.005
2018	0.002
2019	-0.056
2020	-0.140
2021	-0.099
2022	-0.080
2023	-0.020
2024	0.053
2025	0.059
2026	0.065
2027	0.070
2028	0.074
2029	0.089