Year	National currency (Billions)
1991	-0.303
1992	-0.068
1993	-0.010
1994	0.079
1995	-0.191
1996	-0.299
1997	-0.103
1998	0.038
1999	-0.032
2000	-0.105
2001	-0.072
2002	0.036
2003	-0.077
2004	0.133
2005	-0.075
2006	0.009
2007	-0.108
2008	0.783
2009	-0.412
2010	0.850
2011	-0.973
2012	-2.352
2013	-4.163
2014	-1.143
2015	-2.800
2016	-3.606
2017	-3.461
2018	-2.017
2019	-1.239
2020	-7.089
2021	-6.244
2022	-4.900
2023	-4.705
2024	-2.723
2025	-2.170
2026	-1.494
2027	-1.230
2028	-1.193
2029	-1.135