Year kt of CO2 equivalent 1990 25763.45465 1991 24033.09027 1992 21269.67002 1993 18098.68599 1994 15128.42336 1995 13391.19548 1996 13383.20212 1997 12804.78345 1998 12370.92172 1999 11671.68729 2000 10908.84958 2001 11401.59019 2002 11441.08179 2003 11701.00995 2004 11682.83699 2005 11874.26318 2006 12408.13996 2007 12832.0173 2008 12493.79279 2009 11713.74072 2010 12854.22932 2011 12213.05601 2012 12012.26721 2013 11940.18079 2014 11884.57289 2015 11928.83139 2016 11764.31672 2017 11701.90069 2018 12237.61476 2019 12086.47033 2020 11436.59559