Year	% of internal resources
1993	8.569712648988265
1994	8.843600268871848
1995	9.117487889679387
1996	9.391375509562968
1997	9.665263130370507
1998	9.939150750254088
1999	10.213038371061629
2000	10.48692599094521
2001	10.76081361082879
2002	11.03470123163633
2003	11.308588851519911
2004	11.58247647232745
2005	11.856364092211031
2006	12.130251713018572
2007	12.404139332902153
2008	12.678026952785734
2009	12.951914573593273
2010	13.225802193476854
2011	13.499689814284393
2012	13.773577434167974
2013	14.047465054975513
2014	14.321352674859098
2015	7.668853367827773
2016	12.473436200683729
2017	12.473436200683729
2018	12.473436200683729
2019	12.473436200683729
2020	12.473436200683729