Year	% of internal resources
1980	182.5
1981	227.40375
1982	272.30749999999995
1983	317.21125
1984	362.115
1985	407.01874999999995
1986	406.57083332499997
1987	406.12291667499994
1988	405.675
1989	405.22708332499997
1990	404.27916667500006
1991	403.8312499999999
1992	403.38333332499997
1993	402.93541667499994
1994	402.48749999999995
1995	402.03958332499997
1996	401.591666675
1997	401.14374999999995
1998	400.6958333249999
1999	400.24791667499994
2000	399.79999999999995
2001	383.78749999999997
2002	367.77500000000003
2003	351.7625
2004	335.75
2005	337.04999999999995
2006	337.04999999999995
2007	337.04999999999995
2008	337.04999999999995
2009	337.04999999999995
2010	337.04999999999995
2011	337.04999999999995
2012	337.04999999999995
2013	337.04999999999995
2014	337.04999999999995
2015	337.04999999999995
2016	337.04999999999995
2017	337.04999999999995
2018	337.04999999999995
2019	337.04999999999995
2020	337.04999999999995