Year	% of total reserves
1970	32.884153226397046
1972	42.32277127045465
1973	41.24016445998692
1976	88.7706628569924
1977	124.29442306716471
1978	151.38517497543077
1979	118.05736230370816
1980	154.01386954947787
1981	182.03203222489205
1982	214.63534590126386
1983	205.16469749904888
1984	246.23198435708355
1985	288.7428055956562
1986	164.83934267608961
1987	207.30400357021642
1988	232.29358663586066
1989	278.15990807661524
1990	263.82235603453205
1991	206.07326785747333
1992	186.9904059013895
1993	174.9620071793201
1994	150.70054964151183
1995	142.4300352212386
1996	129.65259837092805
1997	120.50060897937098
1998	123.5358701792269
1999	117.60482559440814
2000	103.8608857993424
2001	88.72768697367827
2002	65.26450346434387
2003	55.68423310337484
2004	51.59009383043561
2006	44.656186347697364
2007	43.06568620874115
2008	34.349261119888006
2009	28.095263270965887
2010	25.627365962514652
2011	29.405073445602497
2012	30.727602927661177
2013	32.0024673830404
2014	31.592078392923042
2015	33.557001538856596
2016	33.56007177964338
2017	33.71834160664423
2018	29.057620144176717
2019	29.982473826720092
2020	26.806466203964852
2021	34.92672902118183
2022	37.238570361963355