Year metric tons per capita 1990 6.605232183113109 1991 8.295170872320252 1992 7.516621524893627 1993 7.324646164717057 1994 7.590518705988495 1995 8.685342288205492 1996 8.770709669595531 1997 8.917040881942725 1998 8.5620778277399 1999 9.504064689094525 2000 10.713434087532361 2001 11.804798427391285 2002 12.469364414835882 2003 13.03688929100181 2004 12.660484313578563 2005 12.33070874907363 2006 15.303581240537065 2007 16.21917335073109 2008 15.58429409270668 2009 16.16107582583668 2010 16.335081477101678 2011 16.720415857206557 2012 17.125738103999375 2013 16.510527474139828 2014 16.558313527136008 2015 16.730784278549233 2016 16.415745997676254 2017 15.771797155963181 2018 16.379575832774236 2019 16.45635843475057 2020 15.636201002817495