Year Kilotonnes
1850 0
1851 0.00003
1852 0.00007
1853 0.0001
1854 0.00014
1855 0.00017
1856 0.00021
1857 0.00024
1858 0.00028
1859 0.00031
1860 0.00035
1861 0.00038
1862 0.00041
1863 0.00045
1864 0.00048
1865 0.00051
1866 0.00054
1867 0.00057
1868 0.00061
1869 0.00064
1870 0.00067
1871 0.00076
1872 0.00085
1873 0.00094
1874 0.00103
1875 0.00125
1876 0.00136
1877 0.00146
1878 0.00162
1879 0.00177
1880 0.00186
1881 0.00193
1882 0.00203
1883 0.00219
1884 0.00244
1885 0.00269
1886 0.00269
1887 0.00294
1888 0.00322
1889 0.00361
1890 0.00387
1891 0.00424
1892 0.0045
1893 0.00438
1894 0.005
1895 0.00544
1896 0.00575
1897 0.00594
1898 0.00681
1899 0.00726
1900 0.00802
1901 0.00901
1902 0.00981
1903 0.01033
1904 0.01086
1905 0.01157
1906 0.03762
1907 0.06369
1908 0.08977
1909 0.1159
1910 0.143
1911 0.1701
1912 0.2127
1913 0.2476
1914 0.3541
1915 0.4432
1916 0.3698
1917 0.367
1918 0.3643
1919 0.4322
1920 0.5604
1921 0.6032
1922 0.6151
1923 0.7376
1924 0.7748
1925 1.23
1926 1.528
1927 1.573
1928 1.725
1929 1.931
1930 1.838
1931 1.965
1932 2.298
1933 2.764
1934 3.578
1935 4.051
1936 4.689
1937 5.04
1938 6.908
1939 8.749
1940 11.84
1941 12.34
1942 13.73
1943 13.48
1944 14.23
1945 0.1503
1946 0.122
1947 0.3172
1948 0.9369
1949 11.08
1950 2.239
1951 1.962
1952 2.833
1953 5.809
1954 11.68
1955 16.84
1956 19.47
1957 23.68
1958 28.48
1959 33.84
1960 39.18
1961 42.77
1962 46.85
1963 49.39
1964 50.89
1965 58.67
1966 63.8
1967 69.24
1968 79.6
1969 83.84
1970 90.56
1971 119
1972 105
1973 112.1
1974 118.1
1975 123.4
1976 125.3
1977 128.9
1978 135.6
1979 138.7
1980 143.9
1981 144.5
1982 145.5
1983 161.4
1984 165.2
1985 174.3
1986 178.1
1987 178.1
1988 179.7
1989 185.7
1990 176.7
1991 164.6
1992 162.9
1993 142.8
1994 131.2
1995 128.4
1996 129.1
1997 125.8
1998 121.5
1999 117.3
2000 113