Year	% of internal resources
1992	199.6549599507086
1993	201.3308687615527
1994	180.3203943314849
1995	172.15033887861983
1996	165.82871226124462
1997	154.25754775107825
1998	126.12446087492297
1999	147.4799753542822
2000	135.42821934688845
2001	122.27972889710412
2002	122.23043746149106
2003	129.61182994454714
2004	137.7079482439926
2005	145.40973505853358
2006	149.6487985212569
2007	148.92174984596426
2008	142.08256315465187
2009	137.27664818237832
2010	135.18176216882316
2011	139.19901417128773
2012	147.56623536660504
2013	147.8003696857671
2014	142.84658040665434
2015	144.0418977202711
2016	146.3709180529883
2017	149.35304990757854
2018	149.93222427603203
2019	155.14479359211336
2020	155.14479359211336