Year	National currency (Billions)
1984	-0.005
1985	-0.232
1986	-0.205
1987	-0.684
1988	-0.702
1989	-0.698
1990	-0.679
1991	-0.804
1992	-0.969
1993	-1.492
1994	-0.829
1995	-0.586
1996	-0.713
1997	-1.366
1998	-2.388
1999	-1.848
2000	-1.936
2001	-3.668
2002	-4.981
2003	-4.875
2004	-3.860
2005	-1.729
2006	4.101
2007	-1.586
2008	4.258
2009	3.202
2010	2.239
2011	1.382
2012	3.211
2013	1.261
2014	-7.775
2015	-15.814
2016	-16.988
2017	-20.278
2018	-22.670
2019	-20.405
2020	-32.201
2021	-26.046
2022	-21.655
2023	-22.337
2024	-26.642
2025	-26.963
2026	-27.589
2027	-28.884
2028	-30.854
2029	-32.465