Year	National currency (Billions)
1997	0.084
1998	0.114
1999	0.052
2000	-0.017
2001	-0.049
2002	-0.084
2003	0.289
2004	0.535
2005	0.507
2006	0.553
2007	0.868
2008	0.151
2009	0.170
2010	0.435
2011	0.522
2012	0.419
2013	0.364
2014	0.244
2015	0.135
2016	-0.335
2017	-0.092
2018	0.202
2019	-0.181
2020	-0.283
2021	-0.431
2022	-0.498
2023	-0.120
2024	-0.437
2025	-0.308
2026	-0.324
2027	-0.333
2028	-0.349
2029	-0.375