Year kt of CO2 equivalent 1990 29861.35631 1991 26875.45094 1992 24304.42379 1993 22126.26806 1994 21972.21035 1995 21290.38945 1996 21582.19625 1997 21165.92832 1998 20287.86726 1999 19872.74193 2000 19419.85548 2001 18725.77585 2002 18608.72484 2003 19102.67241 2004 19189.98868 2005 19160.12367 2006 19096.97238 2007 19098.50838 2008 19051.22655 2009 18567.46576 2010 18210.49011 2011 16334.60979 2012 16886.45107 2013 17081.12017 2014 17181.87176 2015 17206.97107 2016 17075.29252 2017 17055.27782 2018 16809.57813 2019 16638.64093 2020 16458.96123