CO2 Year&Month Year Month 333.13 1974.38 1974 5 332.09 1974.46 1974 6 331.10 1974.54 1974 7 329.14 1974.63 1974 8 327.36 1974.71 1974 9 327.29 1974.79 1974 10 328.23 1974.88 1974 11 329.55 1974.96 1974 12 330.62 1975.04 1975 1 331.40 1975.13 1975 2 331.87 1975.21 1975 3 333.18 1975.29 1975 4 333.92 1975.38 1975 5 333.43 1975.46 1975 6 331.85 1975.54 1975 7 330.01 1975.63 1975 8 328.51 1975.71 1975 9 328.41 1975.79 1975 10 329.25 1975.88 1975 11 330.97 1975.96 1975 12 331.60 1976.04 1976 1 332.60 1976.13 1976 2 333.57 1976.21 1976 3 334.72 1976.29 1976 4 334.68 1976.38 1976 5 334.17 1976.46 1976 6 332.96 1976.54 1976 7 330.80 1976.63 1976 8 328.98 1976.71 1976 9 328.57 1976.79 1976 10 330.20 1976.88 1976 11 331.58 1976.96 1976 12 332.67 1977.04 1977 1 333.17 1977.13 1977 2 334.86 1977.21 1977 3 336.07 1977.29 1977 4 336.82 1977.38 1977 5 336.12 1977.46 1977 6 334.81 1977.54 1977 7 332.56 1977.63 1977 8 331.30 1977.71 1977 9 331.22 1977.79 1977 10 332.37 1977.88 1977 11 333.49 1977.96 1977 12 334.71 1978.04 1978 1 335.23 1978.13 1978 2 336.54 1978.21 1978 3 337.79 1978.29 1978 4 337.95 1978.38 1978 5 338.00 1978.46 1978 6 336.37 1978.54 1978 7 334.47 1978.63 1978 8 332.46 1978.71 1978 9 332.29 1978.79 1978 10 333.76 1978.88 1978 11 334.80 1978.96 1978 12 336.00 1979.04 1979 1 336.63 1979.13 1979 2 337.93 1979.21 1979 3 338.95 1979.29 1979 4 339.05 1979.38 1979 5 339.27 1979.46 1979 6 337.64 1979.54 1979 7 335.68 1979.63 1979 8 333.77 1979.71 1979 9 334.09 1979.79 1979 10 335.29 1979.88 1979 11 336.76 1979.96 1979 12 337.77 1980.04 1980 1 338.26 1980.13 1980 2 340.10 1980.21 1980 3 340.88 1980.29 1980 4 341.47 1980.38 1980 5 341.31 1980.46 1980 6 339.41 1980.54 1980 7 337.74 1980.63 1980 8 336.07 1980.71 1980 9 336.07 1980.79 1980 10 337.22 1980.88 1980 11 338.38 1980.96 1980 12 339.32 1981.04 1981 1 340.41 1981.13 1981 2 341.69 1981.21 1981 3 342.51 1981.29 1981 4 343.02 1981.38 1981 5 342.54 1981.46 1981 6 340.88 1981.54 1981 7 338.75 1981.63 1981 8 337.05 1981.71 1981 9 337.13 1981.79 1981 10 338.45 1981.88 1981 11 339.85 1981.96 1981 12 340.90 1982.04 1982 1 341.70 1982.13 1982 2 342.70 1982.21 1982 3 343.65 1982.29 1982 4 344.28 1982.38 1982 5 343.42 1982.46 1982 6 342.02 1982.54 1982 7 339.97 1982.63 1982 8 337.84 1982.71 1982 9 338.00 1982.79 1982 10 339.20 1982.88 1982 11 340.63 1982.96 1982 12 341.41 1983.04 1983 1 342.68 1983.13 1983 2 343.04 1983.21 1983 3 345.27 1983.29 1983 4 345.92 1983.38 1983 5 345.40 1983.46 1983 6 344.16 1983.54 1983 7 342.11 1983.63 1983 8 340.11 1983.71 1983 9 340.15 1983.79 1983 10 341.38 1983.88 1983 11 343.02 1983.96 1983 12 343.87 1984.04 1984 1 344.59 1984.13 1984 2 345.11 1984.21 1984 3 347.07 1984.29 1984 4 347.38 1984.38 1984 5 346.78 1984.46 1984 6 344.96 1984.54 1984 7 342.71 1984.63 1984 8 340.86 1984.71 1984 9 341.13 1984.79 1984 10 342.84 1984.88 1984 11 344.32 1984.96 1984 12 344.88 1985.04 1985 1 345.62 1985.13 1985 2 347.23 1985.21 1985 3 347.62 1985.29 1985 4 348.53 1985.38 1985 5 347.87 1985.46 1985 6 346.00 1985.54 1985 7 343.86 1985.63 1985 8 342.55 1985.71 1985 9 342.57 1985.79 1985 10 344.11 1985.88 1985 11 345.49 1985.96 1985 12 346.04 1986.04 1986 1 346.70 1986.13 1986 2 347.38 1986.21 1986 3 349.38 1986.29 1986 4 349.93 1986.38 1986 5 349.26 1986.46 1986 6 347.44 1986.54 1986 7 345.55 1986.63 1986 8 344.21 1986.71 1986 9 343.67 1986.79 1986 10 345.09 1986.88 1986 11 346.27 1986.96 1986 12 347.33 1987.04 1987 1 347.82 1987.13 1987 2 349.29 1987.21 1987 3 350.91 1987.29 1987 4 351.71 1987.38 1987 5 350.94 1987.46 1987 6 349.10 1987.54 1987 7 346.77 1987.63 1987 8 345.73 1987.71 1987 9