Year kt of CO2 equivalent 1970 704.285 1971 724.166 1972 744.975 1973 769.781 1974 797.98 1975 821.258 1976 852.228 1977 888.196 1978 938.085 1979 967.867 1980 1006.69 1981 1047.08 1982 1089.19 1983 1111.64 1984 1164.09 1985 1206.06 1986 1265.65 1987 1302.2 1988 1378.46 1989 1465.83 1990 1532.05 1991 1593.63 1992 1639.86 1993 1720.01 1994 1885.16 1995 2101.75 1996 2311.17 1997 2517.45 1998 2612.69 1999 2639.52 2000 2694.52 2001 2705.4 2002 2730.45 2003 2758.53 2004 2791.73 2005 2825.07 2006 2871.43 2007 2921.37 2008 2976.81 2009 3033.28 2010 3085.69 2011 3116.5469 2012 3147.4038