Year	National currency (Billions)
2001	0.002
2002	0.223
2003	0.454
2004	0.641
2005	0.179
2006	1.234
2007	0.852
2008	-1.327
2009	-0.846
2010	-0.244
2011	-1.168
2012	-2.461
2013	-6.625
2014	-6.417
2015	-6.498
2016	-10.359
2017	-4.420
2018	-2.926
2019	-3.915
2020	-9.253
2021	-2.871
2022	-1.155
2023	-4.173