Year	% of total reserves
1978	6.85262779779858
1979	2.705841968941001
1980	6.755713229627101
1981	13.895698923878626
1982	8.058036039879454
1983	6.338535251336072
1984	8.947748887711155
1985	25.276656235500827
1986	10.14481587226823
1987	3.945698895950294
1988	4.088868599698854
1989	0
1990	94.46892867772144
1991	363.1162585688467
1992	7.691197233681334
1993	30.544913809891284
1994	11.482348950365285
1995	60.725008771966195
1996	4.437172969808591
1997	6.055294814717054
1998	5.844799542977432
1999	9.263259618724001
2000	10.03611614756731
2001	24.269616430867497
2002	23.27487290417851
2003	21.804766366284596
2004	15.121719116839305
2005	16.12286031879982
2006	14.936989365930042
2007	2.792253297087372
2008	3.44037184803678
2009	1.7282929794964985
2010	1.508690299566134
2011	3.1171157010048227
2012	0.40107128384904756
2013	0.5763975167941371
2014	3.0193430315061787
2015	4.181405600888469
2016	6.753042055457501
2017	4.852232099307809
2018	6.9750324664279635
2019	6.325047053618824
2020	4.0514617497484675
2021	7.441447578817193
2022	8.65790124513737