Year thousand metric tons of CO2 equivalent 1990 166.165 1991 170.82 1992 174.2525 1993 175.6975 1994 176.0775 1995 176.0425 1996 126.9175 1997 138.1475 1998 141.7425 1999 142.95 2000 131.38 2001 124.6125 2002 144.89 2003 162.8375 2004 200.55 2005 168.795 2006 202.245 2007 196.2725 2008 234.5575 2009 174.8575 2010 191.7425 2011 228.165 2012 218.87 2013 232.5725 2014 188.505 2015 199.0725 2016 213.81 2017 225.9375 2018 181.6125 2019 235.5175 2020 197.2475