Year	% of internal resources
1992	4.6634676903390915
1993	5.180822136916187
1994	5.698176583493282
1995	6.215531030070377
1996	6.732885476647472
1997	7.250239923224568
1998	7.767594369801663
1999	8.28494881637876
2000	8.802303262955853
2001	9.752015355086373
2002	10.70172744721689
2003	11.65143953934741
2004	12.600639795265515
2005	13.550863723608444
2006	12.308516385796544
2007	11.066169047984644
2008	9.823821710172744
2009	8.581474372360844
2010	7.3391270351887385
2011	6.096779697376839
2012	4.854432359564939
2013	3.6120850217530394
2014	2.3697376839411386
2015	2.4165067178502877
2016	2.4062699936020473
2017	2.4868841970569417
2018	2.4683301343570054
2019	2.489443378119002
2020	2.489443378119002