Year	% of internal resources
1987	0.9940357852882704
1988	1.137788653081511
1989	1.2815415198807154
1990	1.425294387673956
1991	1.569047254473161
1992	1.7128001222664015
1993	1.856552990059642
1994	2.000305856858847
1995	2.1440587246520875
1996	2.287811592445328
1997	2.431564459244533
1998	2.5753173270377734
1999	2.719070193836978
2000	2.8628230616302184
2001	2.8471172962226636
2002	2.831411530815109
2003	2.8157057654075546
2004	2.8
2005	2.7842942345924455
2006	2.7842942345924455
2007	2.7842942345924455
2008	2.7842942345924455
2009	2.7842942345924455
2010	2.7842942345924455
2011	2.7842942345924455
2012	2.7842942345924455
2013	2.7842942345924455
2014	2.7842942345924455
2015	2.7842942345924455
2016	2.7842942345924455
2017	2.7842942345924455
2018	2.7842942345924455
2019	2.7842942345924455
2020	2.7842942345924455