Year Kilotonnes
1850 24.71
1851 26.96
1852 30.29
1853 31.34
1854 34.86
1855 35.78
1856 35.46
1857 37.05
1858 38.88
1859 40.12
1860 40.97
1861 44.31
1862 44.02
1863 46.39
1864 48.69
1865 51.36
1866 55.59
1867 60.9
1868 54.74
1869 58.81
1870 67.17
1871 64.67
1872 69.46
1873 77.44
1874 71.11
1875 74.52
1876 73.3
1877 71.19
1878 75.49
1879 76.89
1880 84.5
1881 85.35
1882 90.16
1883 95.83
1884 94.22
1885 92
1886 88.64
1887 93.57
1888 99.1
1889 101
1890 111
1891 105.5
1892 105.1
1893 100.3
1894 110.8
1895 112
1896 117.5
1897 122.1
1898 125.5
1899 133.4
1900 141.5
1901 131
1902 136.1
1903 145.7
1904 147.9
1905 149
1906 169.6
1907 170.9
1908 156.3
1909 167.5
1910 177
1911 173.2
1912 174.5
1913 173.7
1914 123.4
1915 101.5
1916 115.7
1917 107.9
1918 101.6
1919 126.7
1920 150
1921 149.8
1922 156.3
1923 206.5
1924 214.4
1925 215.5
1926 223.5
1927 288.1
1928 301.2
1929 371.2
1930 389
1931 366
1932 313.3
1933 349.1
1934 383
1935 386
1936 365.7
1937 403.1
1938 311.1
1939 299.5
1940 244.5
1941 239.6
1942 216.6
1943 198.6
1944 133.6
1945 140
1946 212
1947 270.8
1948 306.9
1949 331.1
1950 298.5
1951 358.8
1952 360.6
1953 343.3
1954 334.5
1955 326.5
1956 382.9
1957 399.1
1958 409
1959 376.7
1960 365
1961 375.8
1962 404
1963 524.4
1964 540.7
1965 561
1966 520.2
1967 501.1
1968 547.9
1969 554.9
1970 565
1971 499.7
1972 529.1
1973 522.1
1974 508.4
1975 429.5
1976 403
1977 439
1978 382.3
1979 406.2
1980 414
1981 356
1982 347
1983 280
1984 250
1985 200
1986 188.5
1987 183.5
1988 177
1989 162.5
1990 177.5
1991 176.5
1992 173.5
1993 160.5
1994 140.5
1995 128
1996 127
1997 113
1998 107
1999 88
2000 84.5