Year % of total reserves 1984 0.7271795634180191 1985 0 1986 0.1053259337353779 1987 0 1988 0 1989 0.0009027491372299968 1990 0.07839176978443446 1991 0.15995761943539702 1992 0.7799187497378202 1993 2.064627254871144 1994 3.7362799711933716 1995 4.903886940273632 1996 5.501434075041809 1997 6.388210745022947 1998 9.48339711331512 1999 9.276640057107038 2000 65.58318458895117 2001 65.4461031774364 2002 47.7333907488088 2003 11.235114559142694 2004 50.16331614738707 2005 97.74062520986875 2006 87.40208775120716 2007 106.62605132784506 2008 83.60391141376583 2009 49.72653634396329 2010 48.79737994208239 2011 36.31118967634318 2012 45.16639238197232 2013 23.042108361141224 2014 19.598720771847784 2015 1.1174763607800442 2016 13.172852347631453 2017 50.01457646455619 2018 52.76070124948793 2019 74.80258166301229 2020 36.886669862824014 2021 113.90277253810535 2022 106.53572287919539