Year	% of total reserves
1976	0
1977	22.950382731589652
1978	12.778779866552897
1979	5.275038111408155
1980	13.980945355015638
1981	38.49024315589188
1982	37.80772190249761
1983	14.440730383172188
1984	31.896830964581795
1985	31.52369428784294
1986	13.775425191709745
1987	22.468153463847525
1988	32.16975172719719
1989	40.20081069692716
1990	16.759110718663596
1991	33.97641236619824
1992	158.81293664996932
1993	158.93948479804766
1994	82.35699327454681
1995	29.10519612984526
1996	5.566939945574659
1997	40.424436734586656
1998	74.27512372396467
1999	43.620580563601614
2000	23.014360302624112
2001	15.224996535975215
2002	14.573030943343804
2003	18.06085819718462
2004	12.118337302792632
2005	27.584612220672522
2006	5.483337329909649
2007	8.261186638121195
2008	0.4979593502803508
2009	4.259978524137767
2010	13.264202083180068
2011	2.825763209425846
2012	6.471610568969008
2013	11.014402036485999
2014	34.69262384633526
2015	17.691422956120498
2016	39.98689876848472
2017	4.4214654067206025
2018	20.95559903771119
2019	28.459681583673536
2020	14.848713992076549
2021	89.80605168602057
2022	76.51630324583255