Year	% of total reserves
1976	0.008178974563311354
1977	10.70534724763415
1978	17.900920380474414
1979	12.724426490364726
1980	13.268258418398727
1981	11.925116801627803
1982	17.62918283136317
1983	14.375596167432617
1984	34.756864113545966
1985	23.82854078573545
1986	16.648230714713023
1987	23.765657192017933
1988	34.926254438982966
1989	64.38418534559304
1990	105.8918112374238
1991	45.625567282852295
1992	70.0793060797199
1993	125.05527424886098
1994	65.41322412279553
1995	32.463102357494456
1996	32.258764674690596
1997	50.088888722239986
1998	29.306675996540203
1999	30.882084445132442
2000	20.107947397664738
2001	16.298402033325758
2002	17.963102986442255
2003	12.603221825031158
2004	4.869527646414669
2005	5.981195421857357
2006	5.020335641825576
2007	3.0056027723120398
2008	0.8733537183112124
2009	1.0048717402424931
2010	1.7518902964938095
2011	15.614681892145061
2012	18.13183317504029
2013	1.694754844946233
2014	2.6435087448164496
2015	1.2276040713876346
2016	22.354159911088587
2017	26.00220164673671
2018	26.152522948334862
2019	23.44725896165515
2020	21.991843558050867
2021	22.14532928768283
2022	21.812211187462495