Year	% of total reserves
1970	56.69257508385258
1971	54.84619839913655
1972	53.533084281327
1973	49.370259827660824
1974	13.748435297379885
1975	14.023487389523797
1976	12.940788462276387
1977	47.783902653186495
1978	83.78101510259492
1979	40.70854967114578
1980	39.75931216033408
1981	94.09131316888514
1982	96.05532068138136
1983	132.62771411478323
1984	171.20470157327878
1985	168.92991969979636
1986	172.39201583913814
1987	141.4586875895737
1988	161.59911338327927
1989	115.35476317292155
1990	115.85712569666894
1991	110.27430005506993
1992	233.35992644680493
1993	170.9218608669211
1994	125.83257644007384
1995	184.89083242803193
1996	132.1178006274648
1997	102.35986104933164
1998	114.64775170599614
1999	109.96381049208328
2000	41.83257637712927
2001	36.313640410020085
2002	36.34207051051576
2003	34.87609624260976
2004	31.02218480130378
2005	22.36158202581816
2006	16.308713549270003
2007	15.527074123286848
2008	14.785426222484025
2009	14.101734480204547
2010	26.16155289429008
2011	26.643021889003226
2012	29.91065737737476
2013	27.55646509788933
2014	25.557714954808752
2015	24.420866565079958
2016	22.38187601745814
2017	33.238186797389396
2018	30.09045595475122
2019	36.72463405715782
2020	32.100629913510026
2021	33.82884598949393
2022	45.47080826698748