Year	National currency (Billions)
2004	-0.001
2005	-0.004
2006	-0.012
2007	-0.006
2008	-0.006
2009	-0.005
2010	-0.008
2011	-0.003
2012	0.004
2013	0.010
2014	0.001
2015	0.007
2016	0.015
2017	0.001
2018	0.020
2019	-0.001
2020	0.010
2021	-0.011
2022	0.007
2023	0.002
2024	0.002
2025	-0.003
2026	-0.004
2027	-0.005
2028	-0.006
2029	-0.007