Year thousand metric tons of CO2 equivalent 1990 707.4 1991 711.3 1992 732.1 1993 811.5 1994 792.1 1995 799.4 1996 819.9 1997 869.6 1998 906 1999 928.6 2000 962.3 2001 1003.1 2002 1067.2 2003 1123.8 2004 1214.3 2005 1237 2006 1248.2 2007 1324.5 2008 1392.2 2009 1499.4 2010 1587.48 2011 1602.28 2012 1602.68 2013 1630.58 2014 1701.38 2015 1528.58 2016 1670.68 2017 1730.38 2018 1987.68 2019 2205.68 2020 2081.68