Year	National currency (Billions)
1980	-0.010
1981	-0.008
1982	-0.010
1983	-0.008
1984	-0.012
1985	-0.023
1986	-0.014
1987	-0.056
1988	-0.033
1989	-0.015
1990	0.003
1991	0.005
1992	0.003
1993	0.002
1994	0.006
1995	0.007
1996	-0.019
1997	-0.022
1998	-0.051
1999	-0.117
2000	-0.152
2001	-0.134
2002	-0.152
2003	-0.072
2004	-0.090
2005	-0.051
2006	-0.024
2007	-0.019
2008	-0.033
2009	-0.026
2010	-0.087
2011	0.036
2012	0.096
2013	0.258
2014	0.219
2015	0.146
2016	0.102
2017	0.048
2018	0.052
2019	-0.021
2020	-0.073
2021	0.125
2022	-0.105
2023	0.028
2024	-0.007
2025	-0.031
2026	-0.065
2027	-0.104
2028	-0.148
2029	-0.157