Year	% of total reserves
1972	0
1973	0.37053031376833073
1974	0.033294428364688856
1975	1.3656914511739313
1976	1.1120037675104002
1977	11.199069974814954
1978	22.53644856556185
1979	26.870782847038704
1980	64.02559224274688
1981	142.81068762068963
1982	100.24680645087885
1983	31.150544377759363
1984	32.601101646817845
1985	37.915215799030406
1986	28.758869633060957
1987	8.448872261985
1988	4.625517659163536
1989	12.691688751728517
1990	23.641990385601886
1991	16.711153692893493
1992	12.554382969101214
1993	6.247026634759569
1994	6.127523041098611
1995	8.383142326737342
1996	8.722505648000137
1997	10.864323100244336
1998	7.734384873823906
1999	15.558843737026184
2000	22.03473410274505
2001	27.629788817434115
2002	33.22776555180004
2003	23.508131797181107
2004	22.09972440955844
2005	24.369094115563474
2006	30.383037097105465
2007	25.95311078461077
2008	32.71849522882448
2009	18.694709361594157
2010	26.374871291909297
2011	22.925271348866456
2012	15.345235788147034
2013	20.637130024808283
2014	18.597935771994013
2015	24.118147145089797
2016	24.26792895324042
2017	32.20000750310383
2018	28.191875306282117
2019	29.78056096210393
2020	25.448261262941397
2021	39.18117053407101
2022	54.90846278400371