Year Kilotonnes
1850 0.4954
1851 0.6207
1852 0.7031
1853 0.8212
1854 1.027
1855 1.207
1856 1.711
1857 2.153
1858 1.973
1859 2.505
1860 2.569
1861 3.169
1862 3.305
1863 3.371
1864 3.563
1865 3.72
1866 3.857
1867 3.759
1868 4.248
1869 3.963
1870 4.724
1871 5.009
1872 5.712
1873 5.775
1874 6.204
1875 7.194
1876 7.63
1877 8.009
1878 7.036
1879 7.12
1880 8.701
1881 8.548
1882 9.608
1883 9.846
1884 10.78
1885 11.6
1886 11.57
1887 11.96
1888 13.45
1889 15.61
1890 15.95
1891 17.15
1892 17.48
1893 17.78
1894 20.44
1895 20.78
1896 21.4
1897 23.7
1898 24.96
1899 31.6
1900 31.9
1901 30.16
1902 31.68
1903 35.38
1904 38.16
1905 38.19
1906 43.58
1907 50.73
1908 54.64
1909 51.14
1910 53.17
1911 51.9
1912 57.71
1913 65.74
1914 62.23
1915 63.32
1916 69.26
1917 30.12
1918 36.23
1919 36.12
1920 52.69
1921 30.07
1922 52.37
1923 67.44
1924 82.6
1925 76.37
1926 69.64
1927 101.5
1928 91.46
1929 115
1930 114.1
1931 111
1932 112.6
1933 119.4
1934 127.1
1935 131.5
1936 141.7
1937 157.1
1938 140.3
1939 167.2
1940 108.3
1941 110.1
1942 118.6
1943 162.9
1944 153.2
1945 73.47
1946 228.4
1947 321.6
1948 368.1
1949 310.3
1950 205.4
1951 256.3
1952 259.5
1953 240.9
1954 249.5
1955 295.3
1956 290.7
1957 330.1
1958 296.6
1959 324.7
1960 367.4
1961 370.8
1962 383.6
1963 396.7
1964 444.6
1965 432.6
1966 397
1967 428.2
1968 477.7
1969 471.7
1970 465
1971 423.2
1972 364
1973 337.7
1974 357.4
1975 345
1976 337.5
1977 302.2
1978 269.3
1979 250.5
1980 245.5
1981 215.5
1982 185.5
1983 152.5
1984 148
1985 133
1986 136
1987 114
1988 112
1989 80
1990 53
1991 49.5
1992 46.5
1993 43.5
1994 43.5
1995 38.5
1996 40.5
1997 38
1998 36.5
1999 29.5
2000 27.5