Year	National currency (Billions)
1990	-0.114
1991	-0.062
1992	-0.103
1993	-0.049
1994	-0.113
1995	-0.086
1996	0.027
1997	-0.162
1998	-0.126
1999	-0.114
2000	0.308
2001	0.077
2002	-0.087
2003	-0.025
2004	0.058
2005	0.237
2006	0.236
2007	0.196
2008	0.465
2009	-0.432
2010	-0.846
2011	-0.437
2012	-0.543
2013	-0.896
2014	-0.208
2015	-1.867
2016	-1.753
2017	-1.395
2018	-1.062
2019	-0.662
2020	-1.669
2021	-0.925
2022	-0.163
2023	-0.715
2024	-0.379
2025	-0.489
2026	-0.572
2027	-0.619
2028	-0.651
2029	-0.725