Year	% of total reserves
1972	0.05445968299939934
1973	0.06395687106694324
1974	0.06566283531099279
1975	0.06980458476111044
1976	0.097892374702309
1977	20.179680564902636
1978	18.77220376074441
1979	23.207788699326183
1980	22.24947206691006
1981	37.58898574347568
1982	30.25456152602457
1983	20.32677782376345
1984	16.52604328575021
1985	32.877530228828796
1986	38.01223044732371
1987	52.17068626536604
1988	68.11055530001227
1989	58.368159740452754
1990	55.287881646550574
1991	37.08414956951746
1992	43.2836800748102
1993	44.83739942067289
1994	58.28581077223869
1995	70.82874748842666
1996	69.87913663016478
1997	60.8880650298529
1998	76.4027732136718
1999	75.97616726590027
2000	71.04804258913921
2001	66.54360940022013
2002	69.12086440227125
2003	340.65327915336997
2004	282.34105561803705
2005	260.48687381151797
2006	210.31972880479577
2007	145.8163608301383
2008	25.367007640749193
2009	19.845168259898777
2010	24.611222311969925
2011	24.94248552080642
2012	32.09630028038081
2013	27.0385272613567
2014	25.084017274906667
2015	31.551264260217742
2016	26.021607470790098
2017	24.9711547743806
2018	29.752835814565564
2019	29.391102784070817
2020	20.840109806746646
2021	19.37848092390741
2022	24.330418587629367