Year	National currency (Billions)
2004	0.037
2005	0.054
2006	0.026
2007	0.032
2008	0.006
2009	-0.034
2010	-0.031
2011	-0.052
2012	-0.087
2013	-0.097
2014	0.016
2015	-0.039
2016	0.002
2017	-0.043
2018	-0.017
2019	0.003
2020	-0.496
2021	-0.228
2022	0.030
2023	-0.002
2024	0.006
2025	0.010
2026	0.013
2027	0.015
2028	0.030
2029	0.031