Year	% of internal resources
2000	0.36111888111888113
2001	0.3845687645687646
2002	0.40798368298368304
2003	0.431416083916084
2004	0.45484848484848484
2005	0.47828088578088573
2006	0.5017132867132867
2007	0.5251456876456877
2008	0.5487179487179487
2009	0.642915777934732
2010	0.7374399474778556
2011	0.8319641170209789
2012	0.9264882865641024
2013	1.021012456107226
2014	1.1155366256503496
2015	1.2100607951934732
2016	1.3045849647365968
2017	1.28501790425641
2018	1.2654508438228438
2019	1.3163111202797204
2020	1.3573738815850815