Year	% of internal resources
1992	5.431802282298296
1993	5.1647342164114916
1994	4.897666150524685
1995	4.630598084809908
1996	4.363530018923103
1997	4.096461953036298
1998	3.8293938873215208
1999	3.562325821434715
2000	3.29525775554791
2001	3.259980503526578
2002	3.2247032513332186
2003	3.189425999139859
2004	3.154148747118527
2005	3.1188714949251675
2006	3.124605768622054
2007	3.1303400424909684
2008	3.136074316187855
2009	3.085573284018579
2010	3.035072251849303
2011	2.9845712196800274
2012	2.934070187510752
2013	2.883569155341476
2014	2.8330681231722
2015	2.7825670910029245
2016	2.7320660588336483
2017	2.3645793910201274
2018	2.2210906588680546
2019	2.704524341992087
2020	2.844864957853088