Year	National currency (Billions)
2002	-0.176
2003	-4.624
2004	-5.891
2005	-2.797
2006	2.364
2007	-10.524
2008	-19.994
2009	-10.691
2010	6.643
2011	-5.618
2012	1.882
2013	-7.047
2014	-20.334
2015	-16.898
2016	1.556
2017	-8.653
2018	21.697
2019	-15.550
2020	-34.703
2021	-6.067
2022	-12.800