Year	National currency (Billions)
1981	-0.001
1985	-0.001
1986	-0.001
1987	-0.001
1988	-0.002
1989	-0.001
1990	-0.007
1991	-0.005
1992	-0.029
1993	-0.037
1994	-0.041
1995	-0.052
1996	-0.095
1997	-0.126
1998	-0.105
1999	-0.173
2000	-0.065
2001	-0.111
2002	-0.108
2003	0.084
2004	-0.049
2005	-0.094
2006	-0.487
2007	-1.235
2008	-1.736
2009	-1.602
2010	-3.193
2011	-2.844
2012	-5.844
2013	-6.952
2014	-5.316
2015	1.721
2016	-3.284
2017	3.149
2018	-4.169
2019	-7.040
2020	-43.767
2021	-22.017
2022	-26.558
2023	-4.324
2024	5.265
2025	17.733
2026	20.814
2027	23.000
2028	26.911
2029	24.670