Year	National currency (Billions)
1998	0.002
1999	-0.174
2000	-0.106
2001	-0.080
2002	-0.144
2003	-0.079
2004	-0.032
2005	-0.064
2006	0.003
2007	0.208
2008	-0.676
2009	-1.104
2010	-0.907
2011	-0.357
2012	0.372
2013	0.201
2014	-0.047
2015	0.062
2016	0.183
2017	0.075
2018	0.060
2019	0.147
2020	-0.862
2021	-1.588
2022	-1.227
2023	-0.835
2024	-0.872
2025	-0.653
2026	-0.389
2027	-0.181
2028	-0.222
2029	-0.219