Year	% of internal resources
1991	85.50000000000001
1992	86.47366522142858
1993	87.44733045000001
1994	88.42099567142857
1995	86.96608946428572
1996	87.93975469285715
1997	88.91341991428573
1998	89.8870851357143
1999	90.8607503642857
2000	92.85714285714288
2001	90.79220779285716
2002	89.75000000000001
2003	84.71428571428572
2004	87.91428571428571
2005	91.11428571428573
2006	94.31428571428572
2007	97.51428571428572
2008	100.71428571428571
2009	103.91428571428574
2010	107.11428571428571
2011	110.31428571428572
2012	113.51428571428572
2013	116.71428571428571
2014	116.71428571428571
2015	116.71428571428571
2016	116.71428571428571
2017	116.71428571428571
2018	116.71428571428571
2019	116.71428571428571
2020	116.71428571428571