Year % of total reserves 1993 6.778792588212113 1994 472.6607710215954 1995 11.607867324789233 1996 7.245582128404014 1997 0.8559459204598718 1998 0.32995893290779993 1999 4.3116932451806065 2000 22.985393594038587 2001 14.18799024287654 2002 11.434174543384827 2003 12.829459440794164 2004 12.836202792678373 2005 15.79291026124893 2006 20.79689746817845 2007 26.491213814066803 2008 17.56545510182166 2009 11.092777775567964 2010 15.587309871508491 2011 0.8857373695873836 2012 14.463642742725574 2013 10.575660106636965 2014 12.950771483270126 2015 21.886779501341703 2016 20.840091539034503 2017 9.602683640862368 2018 8.507858325140235 2019 8.72568221638833 2020 5.815563615879225 2021 0 2022 4.465409278129379