Year	% of total reserves
1970	250.21102752290975
1971	157.79605807999872
1972	128.14122720489883
1973	121.58170612081052
1974	159.65524310196733
1975	201.13671252091652
1976	137.2804845678961
1977	110.09696645734141
1978	134.11048168245193
1979	216.3714114399832
1980	292.3964382350304
1981	435.17177897678874
1982	311.63942917817747
1983	145.98426860069912
1984	82.20596399303777
1985	72.37396008512303
1986	86.30075693438873
1987	112.55729711295983
1988	88.95320422589293
1989	95.47884382749945
1990	73.35819788888348
1991	37.92276827226112
1992	34.406914447671895
1993	37.07255092324554
1994	44.99706128542733
1995	41.80531026861175
1996	38.50693345253417
1997	43.28663197534232
1998	65.45260677965224
1999	53.67982024603404
2000	72.98899084519455
2001	87.74951275097787
2002	100.13209759423407
2003	88.71300868044405
2004	86.98513230802301
2005	90.62615952514487
2006	75.56698516509091
2007	78.57663797092236
2008	104.94963640662507
2009	55.172695406964266
2010	52.53593048058608
2011	59.08852888995521
2012	42.345611553193265
2013	32.887358810911834
2014	32.54203907988301
2015	33.24043593980955
2016	33.732389513778635
2017	35.50317136880211
2018	44.92183650024496
2019	30.828058653604085
2020	54.505726942974505
2021	67.66711106934741
2022	79.7707290598203