Year thousand metric tons of CO2 equivalent 1970 352152.3987467199 1971 318598.9583091027 1972 315458.33112898667 1973 331985.4932404364 1974 260832.40123224075 1975 289022.70315410465 1976 288489.05694336316 1977 342378.100967234 1978 302469.9178298097 1979 332610.54816581367 1980 390008.18759036495 1981 333618.8335456017 1982 383259.6615723634 1983 364055.97419972037 1984 352539.32628419594 1985 325081.04242829507 1986 326681.5698301241 1987 349616.03794761363 1988 314391.34429761546 1989 344491.13239428686 1990 -5069.357315525399 1991 -405.55474534636824 1992 3061.3368297814604 1993 8758.769845813522 1994 5292.2971554100095 1995 628.3205382824299 1996 -6522.247638642834 1997 -9544.919199168677 1998 -5909.887627512213 1999 -7155.317077487723 2000 -13492.367625921968 2001 -10610.090311110063 2002 1790.3150233924305 2003 -96.46691980958462 2004 6671.859092086503 2005 16313.801124095931 2006 22860.661487877318 2007 27861.381215512763 2008 29389.336766839042 2009 21972.710207045024 2010 31147.883130848328 2011 37461.94982951874 2012 47762.83297780146 2013 56312.086625069336 2014 67013.96117031571 2015 58562.63918685903 2016 60900.75713412459