Year	% of total reserves
1977	28.757129470315917
1978	38.499865322104284
1979	1036.8285776961463
1980	410.58061375661373
1981	468.3981591628092
1982	234.15386243605164
1983	854.1532830751534
1984	2020.3239616001965
1985	2041.6936018994281
1986	209.9426781967212
1987	90.75530921992019
1988	71.39117565242057
1989	53.915222070108406
1990	28.403519047605215
1991	30.324354033471067
1992	22.943010054159764
1993	40.290328227809944
1994	24.089969556884103
1995	13.966732562034675
1996	22.10392038028372
1997	13.773814911411723
1998	14.560920441967745
1999	19.935535757148294
2000	25.003932591352296
2001	25.27646337536377
2002	35.05355553317995
2003	55.24781834765532
2004	32.12912749095806
2005	22.85523462488358
2006	14.814455312341176
2007	15.13975842311361
2008	13.684061875286812
2009	19.383332703602527
2010	22.23073506261521
2011	0.4030220985228406
2012	9.541898404115138
2013	6.113381239186041
2014	8.564745787141247
2015	11.071388148088992
2016	20.40598351332454
2017	8.50255598003751
2018	9.79509385405379
2019	10.108152094481687
2020	7.4607591322682065
2021	5.806907733441126
2022	7.120422126800663