Year	% of total reserves
1970	49.09056580023916
1971	45.721180470134485
1972	31.052445060874568
1973	21.90975100268994
1974	23.082043792592238
1975	22.399620268629793
1976	16.86815874736847
1977	33.88776145133397
1978	30.193339874767634
1979	31.233639049092638
1980	44.513222542213946
1981	38.1721164247124
1982	34.115008477808416
1983	29.12408183715458
1984	34.84337370341419
1985	56.518012491623246
1986	55.14899220609809
1987	52.5642081585392
1988	72.1633550550956
1989	62.532201545873434
1990	115.53690127843166
1991	44.88827367348073
1992	58.85924824306738
1993	66.76265550633188
1994	68.9015284663907
1995	103.67312165261649
1996	107.2428494087428
1997	86.91439242121272
1998	73.68289258096151
1999	86.86322723157745
2000	64.90764014636558
2001	52.6718306226156
2002	51.933688259562814
2003	53.66587504203769
2004	45.87762574187107
2005	38.46808643733078
2006	36.347980049878956
2007	46.44765667501301
2008	46.21897861215965
2009	23.555038634671373
2010	26.645133322254143
2011	36.68500250310508
2012	13.839794063007774
2013	13.005549924161228
2014	12.975274507304341
2015	10.897354746055191
2016	10.05612818398645
2017	8.85925002915588
2018	12.70511440255536
2019	9.05164885705105
2020	7.514801233126255
2021	6.513378183004619
2022	2.286560929790329