Year	% of internal resources
2002	4.555737704918033
2003	5.185
2004	5.814262295081967
2005	6.443524590163935
2006	6.643748137131148
2007	6.84425484352459
2008	7.044619970163934
2009	7.24441877795082
2010	7.444642324918033
2011	7.644865871803279
2012	7.845089418770493
2013	8.045312965737706
2014	8.245536512704918
2015	8.445760059590164
2016	8.647540983606557
2017	8.645983606557376
2018	8.645983606557376
2019	8.645983606557376
2020	8.645983606557376