Year kt of CO2 equivalent 1990 5607.602936 1991 5648.11375 1992 5701.569473 1993 5699.540317 1994 5796.102206 1995 5834.312024 1996 5899.266549 1997 5883.506132 1998 5734.520285 1999 5579.961827 2000 5580.762144 2001 5495.978601 2002 5429.635043 2003 5439.34962 2004 5375.246673 2005 5247.509131 2006 5185.4557 2007 5048.991861 2008 4991.484196 2009 4991.439292 2010 4961.4464 2011 4861.9927 2012 4822.439572 2013 4704.257372 2014 4617.556182 2015 4639.201234 2016 4622.128484 2017 4605.561052 2018 4498.428621 2019 4369.86119 2020 4342.761259