Year	National currency (Billions)
1990	0.052
1991	0.033
1992	-0.101
1993	0.068
1994	0.085
1995	0.141
1996	-0.077
1997	-0.029
1998	-0.144
1999	-0.174
2000	-0.203
2001	-0.407
2002	-0.452
2003	-0.253
2004	-0.044
2005	-0.132
2006	-0.092
2007	0.112
2008	-0.164
2009	-0.639
2010	-0.408
2011	-0.389
2012	-0.278
2013	-0.386
2014	-0.297
2015	-0.212
2016	-0.046
2017	0.168
2018	0.234
2019	0.166
2020	-0.957
2021	-0.303
2022	0.632
2023	-0.062
2024	0.127
2025	0.130
2026	0.139
2027	0.145
2028	0.151
2029	0.156