Year	National currency (Billions)
2001	-0.061
2002	-0.050
2003	-0.116
2004	-0.230
2005	0.388
2006	0.316
2007	2.476
2008	0.401
2009	-0.563
2010	-0.412
2011	-0.500
2012	-0.511
2013	0.134
2014	-0.298
2015	-0.386
2016	-0.292
2017	-0.176
2018	-0.128
2019	0.059
2020	0.336
2021	-0.143
2022	-0.215
2023	0.244
2024	0.344
2025	0.476
2026	0.559
2027	0.234
2028	0.315
2029	0.348