Year kt of CO2 equivalent 1990 24.527909 1991 25.235549 1992 25.943189 1993 26.650828 1994 27.358468 1995 28.066108 1996 28.417191 1997 28.768274 1998 29.119357 1999 29.47044 2000 29.821522 2001 29.967852 2002 30.114182 2003 30.260512 2004 30.406841 2005 30.553171 2006 30.629281 2007 30.70539 2008 30.7815 2009 30.857609 2010 30.933718 2011 31.052103 2012 31.170488 2013 31.288872 2014 31.407257 2015 31.525642 2016 31.602719 2017 31.679797 2018 31.756875 2019 31.833952 2020 31.91103