Atmospheric CO2 (ppm) --------------------- Year actual --------------------- 1850 285.22 1851 285.12 1852 285.02 1853 285.02 1854 284.93 1855 285.13 1856 285.43 1857 285.63 1858 285.93 1859 286.13 1860 286.44 1861 286.64 1862 286.74 1863 286.84 1864 286.94 1865 287.05 1866 287.15 1867 287.25 1868 287.35 1869 287.46 1870 287.66 1871 287.86 1872 287.97 1873 288.17 1874 288.37 1875 288.57 1876 288.68 1877 288.88 1878 289.48 1879 290.08 1880 290.79 1881 291.39 1882 292.00 1883 292.51 1884 292.91 1885 293.31 1886 293.81 1887 294.01 1888 294.13 1889 294.23 1890 294.44 1891 294.64 1892 294.75 1893 294.74 1894 294.75 1895 294.76 1896 294.86 1897 294.87 1898 294.88 1899 295.30 1900 295.71 1901 296.22 1902 296.62 1903 297.04 1904 297.54 1905 297.96 1906 298.38 1907 298.81 1908 299.29 1909 299.71 1910 300.12 1911 300.63 1912 301.04 1913 301.27 1914 301.43 1915 301.63 1916 301.95 1917 302.37 1918 302.77 1919 303.02 1920 303.36 1921 303.71 1922 304.13 1923 304.48 1924 304.88 1925 305.28 1926 305.78 1927 306.21 1928 306.62 1929 307.15 1930 307.51 1931 307.97 1932 308.33 1933 308.85 1934 309.28 1935 309.70 1936 310.14 1937 310.57 1938 310.95 1939 311.27 1940 311.31 1941 311.02 1942 310.73 1943 310.54 1944 310.24 1945 310.25 1946 310.28 1947 310.44 1948 310.47 1949 310.85 1950 311.34 1951 311.79 1952 312.20 1953 312.62 1954 313.16 1955 313.71 1956 314.25 1957 314.80 1958 315.34 1959 316.18 1960 317.07 1961 317.73 1962 318.43 1963 319.08 1964 319.65 1965 320.23 1966 321.59 1967 322.31 1968 323.04 1969 324.23 1970 325.54 1971 326.42 1972 327.45 1973 329.43 1974 330.21 1975 331.36 1976 331.92 1977 333.73 1978 335.42 1979 337.10 1980 338.80 1981 339.99 1982 340.76 1983 342.43 1984 343.98 1985 345.46 1986 346.88 1987 348.61 1988 351.14 1989 352.78 1990 353.96 1991 355.29 1992 355.99 1993 356.71 1994 358.20 1995 360.03 1996 361.79 1997 362.90 1998 365.55 1999 367.63 2000 368.81 2001 370.40 2002 372.41 2003 374.96 2004 376.78 2005 378.81 2006 380.93 2007 382.67 2008 384.78 2009 386.29 2010 388.58 2011 390.45 2012 392.48 2013 395.25 2014 397.16 2015 399.43 ---------------------