Year	% of internal resources
2000	20.70212765957447
2001	21.200851063829788
2002	21.699574468085107
2003	22.198297872340426
2004	22.697021276595745
2005	23.195744680851064
2006	24.63063829787234
2007	26.06553191489362
2008	27.500425531914896
2009	28.935319148936173
2010	30.370212765957444
2011	30.370212765957444
2012	30.370212765957444
2013	30.370212765957444
2014	30.370212765957444
2015	30.370212765957444
2016	30.370212765957444
2017	30.370212765957444
2018	30.370212765957444
2019	30.370212765957444
2020	30.370212765957444