Year kt of CO2 equivalent 1970 1277.47 1971 1294.69 1972 1316.96 1973 1340.67 1974 1334.64 1975 1352.34 1976 1394.47 1977 1430.8 1978 1439.22 1979 1419.01 1980 1384.31 1981 1424.45 1982 1501.22 1983 1568.73 1984 1609.37 1985 1641.98 1986 1681.57 1987 1623.49 1988 1697.62 1989 1767.56 1990 1823.6 1991 1874.02 1992 1710.92 1993 1769.91 1994 1831.12 1995 1821.92 1996 1878.61 1997 1951.06 1998 1997.38 1999 2038.73 2000 2100.72 2001 2141.65 2002 2178.72 2003 2220.35 2004 2205.36 2005 2220.95 2006 2226.77 2007 2244.06 2008 2262.27 2009 2312.21 2010 2358.8 2011 2382.388 2012 2405.976