Year Kilotonnes
1850 39.5
1851 40.36
1852 43.45
1853 51.02
1854 58.74
1855 67.21
1856 71.06
1857 73.49
1858 72.58
1859 73.79
1860 79.97
1861 85.93
1862 89.86
1863 90.78
1864 96.47
1865 102
1866 111.7
1867 113.1
1868 115.2
1869 118.2
1870 102.8
1871 102.4
1872 124.4
1873 133.6
1874 127.5
1875 133.6
1876 134.3
1877 131.5
1878 133.9
1879 139.5
1880 156.8
1881 160.8
1882 170.5
1883 179.4
1884 173.5
1885 166
1886 163.5
1887 171.6
1888 177.8
1889 180.6
1890 200.5
1891 201.1
1892 201.3
1893 197.2
1894 208.9
1895 209.6
1896 216.5
1897 227.2
1898 234
1899 250.3
1900 276.3
1901 264.6
1902 247.7
1903 265.3
1904 257.4
1905 256.1
1906 289.1
1907 313.2
1908 318.1
1909 329.8
1910 334.7
1911 356.5
1912 361.6
1913 406.1
1914 288.8
1915 272.2
1916 292.8
1917 312.5
1918 286.7
1919 325.9
1920 458.4
1921 382
1922 468
1923 533.8
1924 588.4
1925 565.5
1926 561.7
1927 591.2
1928 585.2
1929 666.7
1930 682.7
1931 604.1
1932 521.3
1933 538.5
1934 534.9
1935 508.5
1936 530.4
1937 613.5
1938 570.1
1939 575.1
1940 401.4
1941 327.6
1942 348.9
1943 373.4
1944 252.1
1945 344.8
1946 559.1
1947 675.1
1948 719.4
1949 826.8
1950 721.4
1951 866.4
1952 908
1953 841
1954 870.7
1955 859.7
1956 965.4
1957 970.9
1958 947.7
1959 898.5
1960 876.7
1961 913.5
1962 960.6
1963 1089
1964 1183
1965 1248
1966 1277
1967 1369
1968 1364
1969 1410
1970 1545
1971 1610
1972 1706
1973 1996
1974 1996
1975 1738
1976 1706
1977 1545
1978 1610
1979 1706
1980 1631
1981 1282
1982 1229
1983 1012
1984 903
1985 754.1
1986 689.2
1987 680.5
1988 627.8
1989 709.6
1990 663
1991 722
1992 630.5
1993 546.5
1994 520.5
1995 489
1996 477
1997 403
1998 411.5
1999 352.5
2000 313.5