Year	% of internal resources
1987	1.2066666666666666
1988	1.513490598
1989	1.82031453
1990	2.1271384613333333
1991	2.433962393333333
1992	2.740786324666667
1993	3.0476102566666667
1994	3.3544341880000004
1995	3.6612581193333336
1996	3.9680820513333335
1997	4.274905982666667
1998	4.581729914666666
1999	4.888553846000001
2000	5.195377778
2001	5.468888888666667
2002	5.7424
2003	5.782933333333333
2004	5.823466666666667
2005	5.864000000000001
2006	5.864000000000001
2007	5.864000000000001
2008	5.864000000000001
2009	5.864000000000001
2010	5.864000000000001
2011	5.864000000000001
2012	5.864000000000001
2013	5.864000000000001
2014	5.864000000000001
2015	5.864000000000001
2016	5.864000000000001
2017	5.864000000000001
2018	5.864000000000001
2019	5.864000000000001
2020	5.864000000000001