Year	% of internal resources
1995	5.823529411764706
1996	5.739411764705882
1997	5.655294117647059
1998	5.571176470588235
1999	5.487058823529411
2000	5.402941176470588
2001	5.325882352941176
2002	5.248823529411765
2003	5.171764705882353
2004	5.094705882352941
2005	5.017647058823529
2006	4.924705882352941
2007	4.831764705882353
2008	4.738823529411765
2009	4.645882352941176
2010	4.552941176470588
2011	4.519607843235294
2012	4.486274509705883
2013	4.452941176470588
2014	4.620588235294117
2015	4.258823529411765
2016	4.270588235294118
2017	4.108823529411765
2018	4.088235294117647
2019	3.9941176470588236
2020	3.9058823529411764