Year	% of internal resources
1990	1.7435689655172413
1991	1.6172528735689653
1992	1.4909367816034482
1993	1.3646206896551722
1994	1.2383045977068965
1995	1.2929310344827587
1996	0.9455172413793104
1997	0.952250453724138
1998	0.9589836660689655
1999	0.9657168783965516
2000	0.9724500907413792
2001	0.9791833030862069
2002	0.9859165154310345
2003	0.9926497277758621
2004	0.9993829401034483
2005	1.006124319413793
2006	1.0128493647931034
2007	1.019582577137931
2008	1.0263157894655173
2009	1.0330490018103449
2010	1.0397822141551722
2011	1.0465154265
2012	1.0532486388448277
2013	1.0599818511724137
2014	1.0667150635172415
2015	1.073448275862069
2016	1.129655172413793
2017	1.1563793103448274
2018	1.1563793103448274
2019	1.1563793103448274
2020	1.1563793103448274