Year Kilotonnes
1850 0
1851 0.01554
1852 0.03107
1853 0.04661
1854 0.06215
1855 0.07768
1856 0.09322
1857 0.1088
1858 0.1243
1859 0.1398
1860 0.1554
1861 0.1701
1862 0.1847
1863 0.1992
1864 0.2135
1865 0.2277
1866 0.2417
1867 0.2556
1868 0.2694
1869 0.283
1870 0.2965
1871 0.3441
1872 0.3916
1873 0.4391
1874 0.4864
1875 0.5336
1876 0.5807
1877 0.6277
1878 0.6745
1879 0.7213
1880 0.77
1881 0.8096
1882 0.8486
1883 0.887
1884 0.9249
1885 0.9622
1886 0.9989
1887 1.035
1888 1.071
1889 1.106
1890 1.141
1891 1.191
1892 1.257
1893 1.263
1894 1.345
1895 1.57
1896 1.671
1897 1.732
1898 1.9
1899 2.052
1900 2.392
1901 2.548
1902 2.807
1903 2.822
1904 3.081
1905 3.155
1906 3.598
1907 4.043
1908 4.573
1909 4.298
1910 4.399
1911 4.663
1912 5.639
1913 6.083
1914 6.123
1915 6.292
1916 6.301
1917 6.567
1918 7.334
1919 9.496
1920 6.369
1921 6.811
1922 6.723
1923 6.937
1924 7.434
1925 7.432
1926 7.586
1927 8.122
1928 8.252
1929 8.39
1930 8.63
1931 7.816
1932 7.285
1933 7.259
1934 8.031
1935 8.43
1936 8.226
1937 8.94
1938 9.943
1939 9.796
1940 10.29
1941 10.24
1942 10.2
1943 8.89
1944 9.056
1945 10.01
1946 10.22
1947 10.31
1948 0.37
1949 22.46
1950 61.78
1951 80.85
1952 85.11
1953 79.22
1954 73.73
1955 71.97
1956 92.24
1957 81.18
1958 87.41
1959 82.52
1960 102
1961 104.7
1962 118.5
1963 159.4
1964 156.9
1965 157.4
1966 145.5
1967 152.3
1968 164.3
1969 170.1
1970 159.5
1971 143.4
1972 140.5
1973 129.1
1974 140.7
1975 140.5
1976 119.2
1977 135.1
1978 143.2
1979 156.4
1980 183
1981 188.4
1982 207.1
1983 185.6
1984 206.3
1985 236.9
1986 249.7
1987 261.1
1988 291.1
1989 296.5
1990 342.4
1991 343.2
1992 377.9
1993 400.6
1994 446.6
1995 454.1
1996 513.9
1997 505.7
1998 556.5
1999 605.2
2000 704.9