Year	% of total reserves
1981	0
1982	0
1983	24.850230271271045
1984	9.14502496099844
1985	14.94295072463768
1986	11.628882877154801
1987	15.071619683481702
1988	14.102759853345557
1989	7.680560825647782
1990	7.979280860702152
1991	9.203234851200301
1992	4.671977106516874
1993	75.3220748672413
1994	72.7545609521285
1995	90.40899804894832
1996	97.46222258318352
1997	81.95536718968918
1998	73.24988500139136
1999	74.84213081240922
2000	56.83740246588644
2001	52.46685646378918
2002	4.441806650060435
2003	6.286995749061621
2004	4.742583534862669
2005	6.156019023776762
2006	0.6254765689750579
2007	1.802173986080697
2008	0.20765087219860998
2009	0.5882523725308006
2010	0.007723993834441012
2011	0.02469708773472697
2012	0.02015169506457821
2013	0.005698584317728436
2014	0.004518356757062168
2015	0.07506981424551532
2016	2.1319507750303157
2017	0.18841383534510572
2018	0
2019	0
2020	0
2021	0
2022	0.00034744634120356335