Year	National currency (Billions)
1985	-0.102
1986	0.174
1987	-0.332
1988	-0.307
1989	-0.290
1990	-0.274
1991	-0.293
1992	-0.400
1993	-0.856
1994	-0.138
1995	0.358
1996	0.324
1997	-0.419
1998	-1.403
1999	-0.888
2000	-0.754
2001	-2.269
2002	-3.510
2003	-3.132
2004	-1.822
2005	0.582
2006	6.419
2007	1.029
2008	6.644
2009	5.204
2010	4.160
2011	3.422
2012	5.124
2013	3.288
2014	-5.588
2015	-13.532
2016	-14.665
2017	-17.396
2018	-19.349
2019	-16.522
2020	-28.419
2021	-22.276
2022	-16.721
2023	-15.661
2024	-19.314
2025	-19.060
2026	-19.383
2027	-20.002
2028	-21.408
2029	-22.029