Year	National currency (Billions)
2002	-0.019
2003	-0.060
2004	-0.041
2005	-0.026
2006	0.094
2007	0.227
2008	-0.071
2009	-0.201
2010	-0.152
2011	-0.220
2012	-0.186
2013	-0.151
2014	-0.024
2015	-0.218
2016	-0.244
2017	-0.293
2018	-0.290
2019	-0.088
2020	-0.458
2021	-0.085
2022	-0.242
2023	0.050
2024	-0.240
2025	-0.280
2026	-0.310
2027	-0.340
2028	-0.391
2029	-0.428