Year	% of total reserves
1981	3.4327879230640215
1982	4.624150585541998
1983	0
1984	0
1985	0
1986	0
1987	0.04674870260131348
1988	18.714994298854265
1989	16.005239256178623
1990	13.966688459520645
1991	17.1594752591171
1992	15.24282673749687
1993	4.614586811418733
1994	45.4861251580579
1995	30.584231936054373
1996	68.15787501536047
1997	50.22974235011427
1998	64.5971000100254
1999	59.64746240639683
2000	64.69584370684682
2001	70.49802364130836
2002	57.90135942388434
2003	154.64544661442451
2004	165.75026516676547
2005	82.4933425807546
2006	34.899035974706095
2007	32.22252848104312
2008	41.065433486643194
2009	29.20861662584329
2010	7.279919623938678
2011	6.841637180277775
2012	5.869145629079954
2013	6.406468508924827
2014	5.42582656404774
2015	4.395293796029333
2016	3.985730269128593
2017	5.100037069149363
2018	6.867422225817307
2019	7.422067553116293
2020	10.622094903734864
2021	9.259428239133555
2022	9.413582182558331