Year	National currency (Billions)
1996	-0.007
1997	-0.007
1998	-0.025
1999	-0.100
2000	-0.112
2001	-0.116
2002	-0.071
2003	-0.132
2004	-0.003
2005	0.044
2006	0.098
2007	0.105
2008	0.146
2009	0.019
2010	0.037
2011	0.064
2012	0.050
2013	0.035
2014	0.014
2015	-0.132
2016	-0.096
2017	-0.045
2018	0.057
2019	-0.013
2020	-0.279
2021	-0.090
2022	0.071
2023	0.080
2024	0.078
2025	0.081
2026	0.085
2027	0.088
2028	0.091
2029	0.095