Year	National currency (Billions)
1997	-0.004
1998	0.030
1999	0.093
2000	-0.027
2001	0.052
2002	0.016
2003	0.441
2004	0.203
2005	0.144
2006	1.169
2007	1.055
2008	4.948
2009	4.045
2010	1.292
2011	3.038
2012	7.547
2013	1.709
2014	1.101
2015	-0.874
2016	-3.015
2017	-3.768
2018	-0.307
2019	-0.632
2020	-0.251
2021	0.980
2022	6.699
2023	3.513
2024	2.569
2025	1.716
2026	0.915
2027	-0.073
2028	-0.852
2029	-1.626