Year	% of total reserves
1982	130.80410596868862
1983	106.63028789650319
1984	91.28946764022787
1985	87.3817388938899
1986	78.33255843297125
1987	71.50201286724322
1988	84.4791209151547
1989	89.46730293007154
1990	88.86193900012076
1991	78.58009475628555
1992	82.75255063443204
1993	80.7163961074219
1994	73.29701190997368
1995	71.72825321188132
1996	64.16963501206546
1997	59.89638183407481
1998	52.390751065802036
1999	46.53680672092507
2000	42.2072104394792
2001	40.8980173317823
2002	33.91027630349771
2003	31.57532724076839
2004	27.222135995690273
2005	25.283911245688696
2006	22.86064477153125
2007	21.070391710496136
2008	18.451885511770513
2009	16.484133225328943
2010	22.320486194522957
2011	25.75236308163841
2012	26.56313676268394
2013	30.295252017284543
2014	32.83911061971738
2015	27.663083673496935
2016	28.10688644329846
2017	31.50106159503799
2018	34.849973054018385
2019	33.61375218505331
2020	31.692006652399982
2021	34.24151001302744
2022	34.4076696951349