Year	% of total reserves
1970	31.07769421611673
1971	58.778639132627966
1972	107.95013085548806
1973	96.64663724701546
1974	119.57341356556428
1975	200.07944002336887
1976	323.777775303118
1977	687.8430270417939
1978	673.2880194100445
1979	341.0424332125929
1980	284.4367249413574
1981	428.7980788070129
1982	411.39793894789676
1983	371.35442224680565
1984	812.1079756844729
1985	333.1605722737606
1986	1454.216704398409
1987	1035.8024978818942
1988	1032.283314885285
1989	1259.5439081856257
1990	702.3234889185803
1991	697.476724529391
1993	674.0031880241436
1994	302.0618589161505
1995	186.21378294170006
1996	213.95008269364072
1997	107.87717963267609
1998	472.8739309293351
1999	241.62126406013851
2000	31.152534858474283
2001	76.8752466891682
2002	17.14011705095773
2003	35.98593481601737
2004	40.602335355850556
2005	41.86366753436235
2006	58.8347941926879
2007	50.66194989618163
2008	59.159240547670656
2009	23.580824047940993
2010	54.93038366128577
2011	22.723020390521718
2012	27.02303301430421
2013	27.934268631867976
2014	26.607341525065653
2015	24.92329638375976
2016	32.393255185638345
2017	43.27365116491262
2018	39.67688715129645
2019	58.00926163433123
2020	60.79695577078207
2021	50.4609413049027
2022	88.12363762131353