Year	% of total reserves
1991	233.78732791335136
1992	128.44364739726618
1993	176.0273991052506
1994	31.204969010382356
1995	31.328133281734722
1996	132.69156326175158
1997	80.35251279103254
1998	57.659236068612174
1999	39.461862243186346
2000	41.36554683700979
2001	33.70654302395973
2002	38.03030323429767
2003	39.006873356838895
2004	34.99449672756511
2005	51.07989632624421
2006	68.39161894294897
2007	80.00470222109156
2008	102.25216420849202
2009	96.08526999693406
2010	87.92357977460034
2011	74.62724943011729
2012	67.19589900536734
2013	67.0095781518206
2014	55.38435279360966
2015	39.600785473737204
2016	34.19645890247088
2017	33.60606440591357
2018	33.24876091216913
2019	35.4630864257122
2020	31.367262485407544
2021	21.609989260020598
2022	24.373846896120558