Year Kilotonnes
1850 0
1851 0.0006
1852 0.00119
1853 0.00179
1854 0.00239
1855 0.00298
1856 0.00358
1857 0.00418
1858 0.00478
1859 0.00538
1860 0.00598
1861 0.00658
1862 0.00718
1863 0.00779
1864 0.00839
1865 0.00899
1866 0.00959
1867 0.0102
1868 0.0108
1869 0.0114
1870 0.01201
1871 0.01261
1872 0.01322
1873 0.01382
1874 0.01443
1875 0.01504
1876 0.01565
1877 0.01625
1878 0.01686
1879 0.01747
1880 0.01808
1881 0.02787
1882 0.03766
1883 0.04746
1884 0.05727
1885 0.06709
1886 0.07692
1887 0.08676
1888 0.09661
1889 0.1065
1890 0.1163
1891 0.1217
1892 0.1258
1893 0.1283
1894 0.1291
1895 0.1279
1896 0.1826
1897 0.2368
1898 0.2905
1899 0.349
1900 0.4056
1901 0.4864
1902 0.9729
1903 1.459
1904 1.946
1905 2.432
1906 2.919
1907 3.405
1908 3.892
1909 4.378
1910 4.864
1911 5.351
1912 5.837
1913 6.324
1914 6.81
1915 7.297
1916 7.783
1917 8.27
1918 8.756
1919 9.243
1920 9.729
1921 10.22
1922 10.7
1923 11.19
1924 11.67
1925 12.16
1926 12.65
1927 13.13
1928 13.62
1929 14.11
1930 14.59
1931 15.08
1932 15.57
1933 16.05
1934 16.54
1935 17.03
1936 17.51
1937 18
1938 18.49
1939 18.97
1940 19.46
1941 19.93
1942 20.39
1943 20.82
1944 21.21
1945 21.59
1946 21.65
1947 21.91
1948 22.16
1949 22.29
1950 21.13
1951 19.97
1952 18.8
1953 17.64
1954 16.48
1955 15.32
1956 14.15
1957 12.99
1958 11.83
1959 10.67
1960 9.502
1961 8.34
1962 7.177
1963 6.015
1964 4.852
1965 3.689
1966 2.527
1967 3.314
1968 4.1
1969 4.887
1970 5.674
1971 6.461
1972 7.248
1973 8.035
1974 8.821
1975 9.608
1976 10.4
1977 11.18
1978 11.97
1979 12.76
1980 13.54
1981 14.33
1982 15.12
1983 15.9
1984 22.62
1985 24.93
1986 25
1987 24.65
1988 25.14
1989 25.33
1990 25.53
1991 29.73
1992 34.32
1993 39.36
1994 43.53
1995 48.13
1996 52.67
1997 58.79
1998 64.5
1999 70.73
2000 78.05