Year	National currency (Billions)
1990	0.630
1991	0.583
1992	0.627
1993	0.626
1994	0.657
1995	0.667
1996	0.627
1997	0.889
1998	0.705
1999	0.805
2000	0.787
2001	0.956
2002	1.150
2003	1.219
2004	1.288
2005	1.496
2006	1.678
2007	1.908
2008	2.286
2009	2.211
2010	3.132
2011	3.393
2012	3.739
2013	4.063
2014	3.567
2015	4.261
2016	4.240
2017	4.292
2018	4.771
2019	4.750
2020	4.661
2021	4.703
2022	4.809
2023	4.897
2024	4.869
2025	4.920
2026	5.001
2027	5.113
2028	5.340
2029	5.581