Year	National currency (Billions)
1980	0.117
1981	0.166
1982	0.183
1983	0.191
1984	0.210
1985	0.258
1986	0.291
1987	0.301
1988	0.355
1989	0.427
1990	0.582
1991	0.699
1992	1.025
1993	1.138
1994	1.379
1995	1.393
1996	1.780
1997	1.855
1998	2.172
1999	2.779
2000	2.969
2001	3.410
2002	3.980
2003	4.255
2004	5.554
2005	5.834
2006	6.109
2007	7.416
2008	9.084
2009	10.153
2010	9.988
2011	8.854
2012	10.821
2013	12.658
2014	15.405
2015	17.788
2016	19.442
2017	20.857
2018	21.652
2019	22.148
2020	22.319
2021	21.279
2022	22.405
2023	26.439
2024	28.234
2025	30.157
2026	32.305
2027	34.514
2028	36.760
2029	39.173