Year	National currency (Billions)
1980	0.156
1981	0.136
1982	0.184
1983	0.186
1984	0.221
1985	0.243
1986	0.256
1987	0.337
1988	0.428
1989	0.584
1990	0.756
1991	0.816
1992	0.911
1993	0.982
1994	1.177
1995	1.454
1996	1.704
1997	2.039
1998	2.275
1999	2.646
2000	2.825
2001	3.111
2002	3.426
2003	3.908
2004	4.842
2005	5.499
2006	8.031
2007	7.994
2008	9.514
2009	9.253
2010	6.985
2011	7.489
2012	12.178
2013	12.910
2014	14.099
2015	14.595
2016	14.334
2017	16.785
2018	15.684
2019	17.793
2020	19.289
2021	17.986
2022	19.341
2023	25.394
2024	27.371
2025	27.228
2026	29.120
2027	31.077
2028	33.062
2029	34.985