Year kt of CO2 equivalent 1990 446.655 1991 518.88184 1992 518.788179 1993 549.278718 1994 629.027458 1995 648.559297 1996 674.431824 1997 672.067051 1998 700.737779 1999 586.675306 2000 656.976333 2001 1715.988539 2002 2761.604646 2003 3627.657853 2004 4397.69666 2005 5372.561866 2006 5728.739746 2007 6030.923325 2008 6409.899305 2009 6730.603484 2010 7041.484864 2011 6929.128449 2012 6910.640934 2013 6794.503819 2014 6771.222804 2015 6708.725588 2016 6535.020572 2017 6368.614556 2018 6086.210039 2019 6064.569923 2020 5537.128706