Year	% of total reserves
1975	27.972101191660492
1976	33.182242057065615
1977	82.93050553730876
1985	261.8734174081724
1986	182.27095119082716
1987	147.73136085961335
1988	160.06468411573627
1989	136.90479512073674
1990	121.42244142214682
1991	116.20827158944513
1992	172.93930803804454
1993	190.04890143948288
1994	182.48350365381447
1995	188.44400333183034
1996	168.3342445466179
1997	129.6083524404166
1998	148.41100886750164
1999	134.0859156341366
2000	85.16466388644942
2001	81.70796268486554
2002	77.06029588007198
2003	84.39550885751719
2004	62.71977674068478
2005	52.695294941702294
2006	45.645755612983265
2007	41.71814827810688
2008	39.669868096008095
2009	37.85038894800636
2010	44.13483764779732
2011	39.62597448884662
2012	44.02064199595001
2013	46.56952890433838
2014	49.854973636947086
2015	50.10292813705338
2016	48.80402011087056
2017	54.038747404513806
2018	51.839419594041495
2019	54.82809384439978
2020	53.335829249516465
2021	48.88398354856483
2022	60.91926963421049