Year	% of total reserves
1976	0.026151039580482874
1977	17.6921926515778
1978	7.320867094937385
1979	16.329891574999735
1980	20.85493608740789
1981	27.958568159172685
1982	16.668443291846984
1983	21.656995964116177
1984	18.20548695107573
1985	14.129946492724937
1986	11.403152893737335
1987	16.219451481220208
1988	13.419377191620004
1989	6.606429775000244
1990	4.603202380054503
1991	4.216134376400498
1992	9.631616298854796
1993	17.3372814565221
1994	5.891742197052004
1995	4.29931710103564
1996	4.336587620321665
1997	7.807621210953817
1998	0.05260760728548964
1999	0.04543797041733513
2000	2.718142864562308
2001	3.33357222597742
2002	9.021161554215276
2003	15.190047997205555
2004	12.503253594835808
2005	33.417324534078304
2006	4.147306388318311
2007	4.027757102108231
2008	5.400908131686093
2009	9.842099811136036
2010	10.840209934427063
2011	24.008507265528543
2012	3.494747531876305
2013	3.910826620845297
2014	7.412565425279458
2015	8.86687751393082
2016	10.704724214040043
2017	5.700919847756747
2018	4.70108619917679
2019	5.050971400910823
2020	1.9946146606832666
2021	2.9515424713678904
2022	5.955443575921797