Year	% of total reserves
1970	53.46229480670044
1971	61.46034775446193
1972	40.45727191324687
1973	24.903373648577322
1974	23.965069370664768
1975	33.037583494921314
1976	32.157139815121674
1977	25.15013700420385
1978	26.38384564235298
1979	38.54736020988451
1980	47.009412814533526
1981	62.04807677993376
1982	39.71806281658337
1983	29.70721548403825
1984	57.87289768470587
1985	91.64449748150379
1986	127.17861726231459
1987	158.24155572031017
1988	203.65655161792589
1989	212.7982678930259
1990	304.343197327031
1991	338.91894934950176
1992	288.3598072772354
1993	97.5220760944157
1994	52.15527507201758
1995	127.98985714759736
1996	215.37960728747868
1997	138.25472244595835
1998	132.82945972645373
1999	86.43291646452673
2000	72.76512048128716
2001	31.14648850769386
2002	17.50835132150784
2003	10.53691293824568
2004	11.615788394472853
2005	11.071746077983164
2006	10.265551707982384
2007	14.102990808418625
2008	15.181714057025792
2009	10.774559146042435
2010	27.04633917800271
2011	20.44872398249595
2012	29.418898707591563
2013	60.800442517355805
2014	38.35236196501373
2015	32.32496451798543
2016	32.32761760921993
2017	47.19042830662145
2018	68.32643039849087
2019	55.80432428610656
2020	39.03296450504211
2021	39.77651582785507
2022	88.3322730333447