Year	National currency (Billions)
1992	0.117
1993	0.084
1994	0.236
1995	-0.681
1996	-0.639
1997	-0.181
1998	-1.793
1999	-2.866
2000	-1.162
2001	-0.367
2002	-0.696
2003	0.965
2004	-0.431
2005	-3.518
2006	-1.630
2007	-2.465
2008	-4.599
2009	-3.512
2010	-3.013
2011	-0.656
2012	-0.674
2013	-1.700
2014	0.590
2015	-0.241
2016	0.244
2017	-1.041
2018	2.014
2019	1.338