Year	National currency (Billions)
1980	0.152
1981	0.169
1982	0.187
1983	0.208
1984	0.231
1985	0.245
1986	0.257
1987	0.311
1988	0.368
1989	0.396
1990	0.543
1991	0.618
1992	0.788
1993	0.959
1994	1.326
1995	1.599
1996	1.821
1997	1.957
1998	2.204
1999	2.361
2000	2.137
2001	2.161
2002	2.338
2003	2.646
2004	2.976
2005	3.591
2006	4.099
2007	4.746
2008	5.417
2009	5.928
2010	6.829
2011	8.023
2012	8.718
2013	9.390
2014	9.850
2015	10.352
2016	10.964
2017	11.593
2018	12.847
2019	13.234
2020	12.617
2021	12.228
2022	12.775
2023	13.663
2024	14.479
2025	15.434
2026	16.391
2027	17.434
2028	18.519
2029	19.658