Year kt of CO2 equivalent 1990 179.349286 1991 326.149435 1992 2078.686884 1993 2261.324333 1994 2430.357181 1995 2615.27483 1996 2972.842443 1997 4545.999855 1998 5796.209768 1999 7441.10198 2000 6704.651693 2001 8968.012856 2002 8248.394619 2003 9382.848682 2004 13195.90025 2005 13658.06411 2006 13534.65603 2007 14205.20024 2008 13328.71466 2009 12692.62428 2010 12842.35769 2011 12206.72611 2012 11882.63143 2013 11739.98675 2014 13756.70787 2015 12673.56899 2016 12361.18175 2017 11334.9762 2018 10907.31395 2019 10292.5386 2020 9542.961347