Year	National currency (Billions)
2004	0.034
2005	0.051
2006	0.023
2007	0.029
2008	0.003
2009	-0.036
2010	-0.032
2011	-0.053
2012	-0.088
2013	-0.098
2014	0.013
2015	-0.043
2016	-0.002
2017	-0.047
2018	-0.022
2019	-0.002
2020	-0.508
2021	-0.258
2022	0.007
2023	-0.041
2024	-0.036
2025	-0.031
2026	-0.029
2027	-0.026
2028	-0.010
2029	-0.009