Year	% of total reserves
1975	27.97210119166049
1976	33.18224205706561
1977	82.93050553730876
1985	261.8734174081724
1986	182.27095119082713
1987	147.73136085961332
1988	160.06468411573627
1989	136.9047951207367
1990	121.42244142214682
1991	116.20827158944513
1992	172.93930803804452
1993	190.0489014394828
1994	182.48350365381447
1995	188.44400333183034
1996	168.3342445466179
1997	129.6083524404166
1998	148.41100886750164
1999	134.08591563413657
2000	85.16466388644942
2001	81.7079626848655
2002	77.06029588007198
2003	84.39550885751721
2004	62.71977674068478
2005	52.695294941702294
2006	45.64575561298325
2007	41.71814827810688
2008	39.66986809600809
2009	37.850388948006376
2010	44.13483764779733
2011	39.625974488846616
2012	44.02064199595001
2013	46.56952890433837
2014	49.854973636947065
2015	50.1029281370534
2016	48.80402011087056
2017	54.03874740451379
2018	51.839419594041495
2019	54.82809384439978
2020	53.33582924951646
2021	48.88398354856483
2022	60.91926963421049