Year Kilotonnes
1850 0
1851 0.0002
1852 0.00039
1853 0.00059
1854 0.00079
1855 0.00099
1856 0.00118
1857 0.00138
1858 0.00158
1859 0.00178
1860 0.00197
1861 0.00216
1862 0.00235
1863 0.00253
1864 0.00271
1865 0.0029
1866 0.00308
1867 0.00325
1868 0.00343
1869 0.0036
1870 0.00378
1871 0.00429
1872 0.00481
1873 0.00533
1874 0.00585
1875 0.00707
1876 0.00772
1877 0.00828
1878 0.00918
1879 0.01003
1880 0.01051
1881 0.01092
1882 0.01153
1883 0.01243
1884 0.01381
1885 0.01523
1886 0.01524
1887 0.01664
1888 0.01824
1889 0.02048
1890 0.02195
1891 0.02402
1892 0.02549
1893 0.02482
1894 0.02833
1895 0.03081
1896 0.0326
1897 0.03363
1898 0.03861
1899 0.04111
1900 0.04544
1901 0.05107
1902 0.05561
1903 0.05855
1904 0.06157
1905 0.06557
1906 0.2132
1907 0.3609
1908 0.5087
1909 0.6566
1910 0.8102
1911 0.9638
1912 1.205
1913 1.403
1914 2.006
1915 2.512
1916 2.096
1917 2.08
1918 2.064
1919 2.449
1920 3.175
1921 3.418
1922 3.486
1923 4.18
1924 4.39
1925 6.969
1926 8.656
1927 8.913
1928 9.776
1929 10.94
1930 10.42
1931 11.13
1932 13.02
1933 15.66
1934 20.27
1935 22.96
1936 26.57
1937 28.56
1938 39.15
1939 49.58
1940 67.1
1941 69.93
1942 77.78
1943 76.4
1944 80.66
1945 0.8517
1946 1.628
1947 3.749
1948 6.193
1949 8.638
1950 7.987
1951 15.13
1952 17.6
1953 55.95
1954 59.66
1955 66.31
1956 70.04
1957 69.43
1958 66.13
1959 66.29
1960 66.4
1961 88.92
1962 97.55
1963 107.5
1964 111.4
1965 100.1
1966 117.4
1967 131.3
1968 133.3
1969 151.8
1970 183.2
1971 197.4
1972 198.8
1973 227
1974 264
1975 282.7
1976 291.7
1977 337.9
1978 359.7
1979 433.3
1980 481.4
1981 555.5
1982 519.6
1983 484.5
1984 530.9
1985 640.4
1986 632.9
1987 602.1
1988 709
1989 756.4
1990 853.2
1991 737.9
1992 671
1993 660.5
1994 626.6
1995 609.5
1996 602
1997 640.1
1998 524.2
1999 458.1
2000 413.9