Year	% of total reserves
1972	1.4639336195323265
1973	2.332964846695436
1974	1.6540927973236301
1975	1.6229392495396098
1976	4.410736121789658
1977	206.60048696139302
1978	134.99535034237144
1979	418.9618279007255
1980	928.943422047244
1981	1635.030220171028
1982	1587.242309665454
1983	6246.874533127889
1984	8435.691105982905
1985	9561.452527047913
1986	7397.047963333334
1987	7758.553339264532
1988	18849.72233910891
1989	1990.09890411985
1990	260.37938482776724
1991	40.13188847201152
1992	28.961881030197407
1993	18.21425451606385
1994	28.86293455183793
1995	55.722993755225424
1996	25.81311227664949
1997	32.42697838362743
1998	45.80149895787294
1999	51.50636794213674
2000	35.886713222806364
2001	39.12277069280311
2002	44.34060216899034
2003	42.61919951978979
2004	49.246587967312514
2005	33.35179723712891
2006	57.98494681205394
2007	58.49620871926105
2008	66.24808892289742
2009	71.58361141923973
2010	42.62028594941138
2011	96.03765934766926
2012	68.03697314933666
2013	130.8924854874042
2014	137.59526340433314
2015	58.489971323110765
2016	41.86117102050642
2017	20.434462819168708
2018	23.95392442584286
2019	8.477176254151926
2020	7.98333469032948
2021	7.162590914240602
2022	5.917293031541628