Year	% of total reserves
1973	0
1974	0.22061142384871774
1975	0.3201638165976764
1976	0.2585327266961705
1977	66.91595643755849
1978	76.23777833202946
1979	3239.991133267621
1980	2677.2655120879117
1981	347.4282544637893
1982	513.5045125440901
1983	612.4361661672033
1984	193.7044761111178
1985	244.23058257366338
1986	144.69717613822232
1987	76.73069627441886
1988	71.3525008121274
1989	50.38792222747522
1990	241.87696722096433
1991	295.4931203755048
1992	398.3649482564148
1993	491.61663681622383
1994	662.0776545970704
1995	498.95916390656396
1996	216.18746387682629
1997	58.39419715725982
1998	133.96194528481985
1999	142.427084521547
2000	105.69595696797627
2001	60.045511408246114
2002	63.71037728597195
2003	37.74990154987545
2004	15.049587480426165
2005	20.536602372170126
2006	37.83116617978494
2007	94.38996417939936
2008	62.39080561415119
2009	66.05047224486117
2010	41.49768577017417
2011	37.933743127662275
2012	44.48270491494022
2013	44.45584347237408
2014	36.92134559058505
2015	24.51433575269441
2016	17.271514746922186
2017	11.060622471418096
2018	15.559081796011503
2019	16.613509344734297
2020	13.783595544677254
2021	9.851177069086642
2022	8.315935719328671