Year % of total reserves 1977 0.14676885229556233 1978 0 1979 0 1980 0.14652497846225845 1981 0.08922818482991601 1982 0 1983 0 1984 0.04603626250549101 1985 0 1986 0 1987 0 1988 0.022167530182096613 1989 0.005920253155039438 1990 0.3012453800905527 1991 0.47447874220743463 1992 0.2657047713968514 1993 0.28311614535555624 1994 0.23143634937919377 1995 0.0948034139920544 1996 0.00630573263055158 1997 0 1998 0 1999 0 2000 0 2001 0 2002 0 2003 0 2004 0 2005 0 2006 0 2007 0 2008 0 2009 56.23842737753956 2010 56.72440234705025 2011 61.970549289245405 2012 95.61738548202845 2013 83.14524600933358 2014 136.3059485770027 2015 111.55155302609612 2016 93.2458085660962 2017 87.57166992047794 2018 76.42171271514303 2019 77.58331676096064 2020 85.95377135667015 2021 86.59081328060728 2022 106.74350863004032