Year	% of internal resources
1993	3.7703658536585367
1994	4.2906910569105685
1995	4.034593495934959
1996	4.50410569105691
1997	4.456951219512195
1998	4.435406504065041
1999	4.413861788617886
2000	4.402284552845528
2001	4.376829268292683
2002	4.234512195121951
2003	4.09219512195122
2004	3.9498780487804876
2005	3.807560975609756
2006	3.5684247967479674
2007	3.3292886178861787
2008	3.0901524390243904
2009	2.8510162601626017
2010	2.6778455284552845
2011	2.6859756097560976
2012	3.2252032520325207
2013	3.8918699186991867
2014	3.7526422764227645
2015	1.8739837398373986
2016	2.1591463414634147
2017	2.450943367886179
2018	2.50609756097561
2019	2.1402439024390243
2020	1.75609756097561