Year	% of total reserves
1970	11.944939313091837
1971	12.33881492886038
1972	15.637403435384863
1973	13.217923748910202
1974	9.022565540974233
1975	3.949034253505629
1976	2.711639023583698
1977	123.51344701394737
1978	112.28015364566983
1979	50.78008148860628
1980	39.68166270985343
1981	106.6249645098694
1982	66.12066208839204
1983	31.8629131083607
1984	55.50462091072447
1985	34.48014685456703
1986	30.294636919136543
1987	36.6554753183687
1988	25.20162160903137
1989	46.960395948650316
1990	103.47591136148695
1991	61.06864434839186
1992	100.68570038133966
1993	91.64337525953276
1994	84.14628785063393
1995	77.28239268798218
1996	70.26936195511851
1997	109.67693788732555
1998	157.97851745607673
1999	134.29156542127362
2000	171.47845359702362
2001	122.02117853842174
2002	100.1438003631385
2003	51.50810354064963
2004	31.466440785374562
2005	40.68526218343113
2006	52.08253839686606
2007	54.96805779204285
2008	55.92899349407242
2009	40.932154317500206
2010	40.55582137216523
2011	45.57075303247297
2012	44.69327365051692
2013	65.33469223822924
2014	55.03718533880221
2015	57.53693379188276
2016	47.57874658693365
2017	47.50804794303364
2018	58.022508409448314
2019	61.359107430699254
2020	65.61155015645824
2021	51.84943389983487
2022	99.594055228652